2 Ct Bichromate Of
Bichromate Of Potassa. Ko, 2 Ct Os. Ms Salt Is Largely Manufactured For Calico-printers. Its Solution Should Not Be Brought Into Contact With The Sldn, As It Sometimes Causes Sores Difficult To Heal. One Ounce In Ten Of Cold Water Forms It Saturated Solution; It Is Much More Soluble In ...
Aberration
Aberration. This Is A Term Much Used In Optics. When A Pencil Of Light Is Refracted Through A Lens, Or Reflected From A Mirror, It Happens In Certain Cases That The Directions Of The Refracted Or Re Flected Rays Do Not All Pass Accurately Through A Focus. This Error Is ...
Accelerators
Accelerators. This Name Is Given To Any Substances Used In Photographic Processes, With A View To Shorten The Time Of ..v Posure, Either In The Camera Or The Printing-frame. Ir Daguerreotype, Bromine And Chlorine, And Especially Bromine, Exer Cise A'very Decided Accelerating Action, The Time Of Exposure Being Reduced From ...
Acetate Of Soda
Acetate Of Soda. The Crystals Are Na 0, Ac 03, 6 H 0 = 137. This Is The Most Convenient Acetate For The Photographer, And He May Make It By Saturating Aommon Washing Soda (carbonate Of ' Soda) With Acetic Acid, Or Vinegar, And Afterwards Crystallizing And Recrystallizing. It Is ...
Acids
Acids. The Uses Of Acids For Special Purposes, Not Actino-chemi Cal, As In The Making Of Pyroxylin, Cleaning Vessels, Removing The Size Of Paper, He., Are Specified Under The Proper Heads. Their Action In Photo-chemistry Is What Concerns Us Here. Acids Are Substances Sour To The Taste, Which Change Vegetable ...
Albumen
Albumen. This, In Photography, Means The White Of An Egg, Which Is A Pure Form Of It. It Is Used On Paper For Both Negatives And Positives, And On Glass For Negatives And Dia-positives, As A Vehicle For The Sensitive Silver Salts. For Negatives On Paper, Albu Men Is Not ...
Albumen Dia Positive Process On Glass
Albumen-dia-positive Process On Glass. Positives Obtained By This Process Are Intended To Be Viewed By Transmitted Light. The Manipulation Is So Nearly Identical With That Of The Albumen-negative Process, Described In The Foregoing Article, That It Is Only Necessary To Point Out The Difference Between Them. The Negative To Be ...
Albumen Negative Process On Glass
Albumen-negative Process On Glass. , To Prepare The Abumen.—colleet In A Basin The Whites Of A Number Of Eggs, Carefully Separating The Germ, And All Portions Of Yelk. To Each Ounce Of This Albumen Add One Dram Of Distilled Water, In Which Is Dissolved 6 Grains Of Iodide Of Potassium ...
Alcohol
Alcohol. On This Important Substance The Remarks Interesting To A Photographer Will Be, Its Special Use In The Collodion Process, Its Effect As Organic Matter On The Photogenic Image, And Its Assist Ance In Developing. Pure Alcohol As Organic Matter Is Nearly Inert In Photolytic Processes, But When Decomposed Or ...
Alkaline Collodion N S
Alkaline Collodion. N. S. Bath, Toning Bath, Ste. See "collodion," &e. Alilalts. Certain Oxides Of Metals And Compound Radicals Which Are Of Au Acrid Taste, Which Change Vegetable Blues To Greens, And Whose Properties Are Masked Or Neutralized By Their Union With Acids. Their Actinic Effects Are Opposed Also To ...
Ammonio Citrate Of Iron
Ammonio-citrate Of Iron. This Neutral Double Salt Of Citrate Of Peroxide Of Iron, And Citrate Of Ammonia, Dissolved In Water, And Mixed With Solution Of Ferro-cyanide Of Potassium, Gives A Purple Solution Nearly Black. Papers Prepared With This Are Bleached In The Light, But Darken Again In The Dark. Salts ...
Artificial Ultramarine
Ultramarine, Artificial. This Substance, Which Is Chiefly Composed Of Sulphide Of Sodium, Is Extensively Used In The Arts, Particularly By Paper Makers For Giving A Blue Tint To Paper. There Is A Very Large Manufactory Of It At Dusseldorf, Where Some Hundreds Of Men And Women Are Employed. The Following ...
Base And Basic
Base And Basic. In Chemistry, That Element Of A Compound Which Most Resembles Hydrogen, And Is Most Unlike Oxygen In Its Chemical And Electro-chemical Relations, Is Called The Base, And In Substances Composed Of Two Simpler Compounds, That Compound Which Is Like Hydrogen Is Still The Base, In Electrolysis, The ...
Bleaching
Bleaching. Light Has A Very Powerful Effect In Bleaching Linens, Woollen, And Other Fabrics From Which The Colour Is Capable Of Being Discharged, Though Its Effects In This Way Have Not Received The Attention Which They Demand. The Action Of Light Has Often Been Described As A Deoxidizing Action, But ...
Blue
Blue Glass. The Question Whether Blue Or White Glass Is The Best For The Portrait-room, Has Been Frequently Discussed. Blue Glass Increases The Time Of Exposiut More Or Less, According To The Depth And Shade Of Colour, But Not To Such An Extent As To Constitute A Practical Objection To ...
Bromide Op Silver
Bromide Op Silver. Ag. Br. An Insoluble Salt Of Silver, Of A Yellowish Colour, And Thrown Down Whenever Bromine In Solution, Or Any Soluble Bromide, Is Added To Nitrate Of Silver. It Is Soluble In Concentrated Solutions Of Nitrate Of Silver, And Of Vaiious Iodides, Bromides, And Analogous Salts, And ...
Bromide Of Potassium B
Bromide Of Potassium. B. Br. When Pure, This Is The Most Convenient Bromide To Select, When A Sensitive Surface Containing Bromide Of Silver Is To Be Formed By Double Decomposition. Its Usual Impurities Are Carbonate Of Potassa And Chlmide Of Potassium, Derived From The Carbonate Used In Its Manufactine. The ...
Bromides
Bromides. The Most Useful Salts Of This Class Have Been Specified Above. In The Selection Of The Most Suitable For The Purpose In Hand, Attention Must Be Paid Especially, 1st, To Their Freedom From Carbonates And Oxides ; 2nd, To Their Stability In Crystals And In Their Proper Solutions ; ...
Calotype Process
Calotype Process. (gr. Icaxoe, Beautiful, Rvroe, An Impres Sion.) Under This Head Are Included Certain Processe,s For Producing Negatives On Paper, Which Are Identical In Principle, And Differ Only In The Manipulation. The Principle Of The Calotype Process Is As Follows :-1st. To Pre Pare And Expose In The Camera ...
Calotype Processes Class I
Calotype Processes. Class I. There Are Two Methods Which Come Under This Head. In The First, Argento-iodized Paper Is Prepared By What Is Called The " Double Wash ;" In The Second, By The " Single Wash." In All Other Respects The Two Methods Are Identical. To Argento-iodize The Paper ...
Calotype Processes Class Ii
Calotype Processes. Class Ii. In These Processes, The Operations Consist In First Impregnating The Paper With An Alkaline Iodide ; Next, Rendering It Sensitive By Immersion In A Strong Bath Of Aceto-nitrate Of Silver, And Developing With Gallo-nitrate Of Silver Rather Weaker In Silver Than In The Fore Going Process. ...
Camera Obscura
Camera Obscura. (latin, "camera," A Chamber). A Dark Box, In Which The Real Image Formed By A Convex Lens Is Received On A Focussing Screen. A Photographic Camera Is One In Which A Sensitive Photographic Tablet Can Be Inserted To Receive The Image. As Might Have Been Expected, There Are ...
Catalytic Action
Catalytic Action, (caraxvatc, Dissolution.) The Following Are A Few Instances Of What Has Been Called Catalytic Action. Clean Surfaces Of Platinum Attract Hydrogen And Oxygen Gases So Powerfully, That, Without Combining With Them In Any Way, It Draws Them Into Such Close Contact With Itself, And With One Another, That ...
Chemistry Of Photography
Chemistry Of Photography. It Has Been Said That Light Does Not Fall On Any Body In The Universe, On Which It Does Not Leave Traces Of Its Passage, And That It Cannot Be Absorbed Or Reflected, Without In Some Way Modifying The Structure And Properties Of The Sub Stance On ...
Chloride
Chloride. The' Compounds Of Other Elements With Chlorine Are Either Acid.s Or Chlmides. With Oxygen And Hydrogen It Forms Acids, Vrith Metals And Other Elements Chlorides. The Chlorides Of The Alkalis And Alkaline Earths Are Used In Photography Not As Sensitive Bodies, But As Convenient Salts For The Production Of ...
Chloride Of Gold
Chloride Of Gold. There Are Two Chlorides Of Gold, Viz., Au. Cl. And Au. C1.2: The Former Is Prepared By Heating The Latter To The Temperature Of Melting Tin, Till No More Chlorine Is Evolved, And Is Decomposed By Water Into The Latter And Metallic Gold. The Second Of These ...
Chloride Of Platinum
Chloride Of Platinum. The Chloride Of Platinum Usually Spoken Of Is A Bichloride (pt. C1.2) Easily Soluble In Water, Ether, Or Alcohol. The Protochloride (pt. Cl.) Is Insoluble Like The Responding Salt Of Gold. When The Bichloride Of Platinum Is Mixed With Lime Water, Or Solution Of Carbonate Of Soda, ...
Chloride Of Zinc
Chloride Of Zinc. Zn. Cl. = 68, Or, As Produced By Evapo Rating Its Solution, Zn. Cl. H 0 = 77. It May Be Formed By Evaporating A Solution Of Zinc In Hydrochloric Acid To Dryness, And Heating The Residue Red-hot In A Glass Tube With A Small Aperture. The ...
Chromatype
Chromatype. A Name Given To That Class Of Photogenic De Compositions In Which Chromic Acid Is Deoxidized : The Sesquioxide Of Chromium Does Not Appear To Undergo Reduction To The State Of Protoxide, And In This It Differs From The Persalts Of Iron In Ferrotype. The Following Are The Modes ...
Chromic Acid And Chromates
Chromic Acid And Chromates. Chromic Acid Is A Teroxide Of Chromium Cr. : And Resembles Ferric Acid Fe. The Com Pounds Of Iron And Chromium Are, Indeed, Generally So Similar In Their Reactions, That We Might Almost Expect Them To Act, Photo Graphically, In The Same Manner. Chromic Acid Is ...
Cisterns Leaden Pipes
Leaden Pipes, Cisterns, &c. When Pure Rain Water Is Col Lected In Leaden Tanks, Or Passed Through Leaden Pipes, The Lead Is Oxidized By The Air Contained In The Water, And A Small Quantity Of The Oxide Formed Is Dissolved In The Water, Thereby Communicating To It Poisonous Qualities. The ...
Citrate Of Silver
Citrate Of Silver. 3 Ag. 0, Ci. H 0. This Falls As A Shin Ing White Powder On Mixing Citrate Of Soda With Nitrate Of Silver, And Has Been Used As The Basis Of A Printing Process, For The Par Ticulars Of Which The Reader Is Referred To The Article ...
Citric Acid
Citric Acid. This Acid Is Gradually Formed In Lemons And Other Fraits, By The Oxygen Of The Air Acting On The Mucilages Which Are Found In The Fruits In Their Less Matured Condition ; Just As Tannin Is Converted Into Gallic Avid By The Same Means. It Is Precipitated By ...
Cleansing
Cleansing. The Clea,nsing Of Bottles, Papers, Stirrers, And Ap Paratus In General, Is A Matter Of Essential Importance In Many Photographical Operations ; And The Great Rule Must Be To Dean Immediately After Use, When Purity Is Obtained With Much More Cer Tainty And Much Less Labour. All Dirty Glasses, ...
Clearness
Clearness. This Quality In A Photograph Implies The Absence Of Any Action Except What Is Induced By The Impact Of Light, The Exact Amount Of Exposure, Both As To The Intensity Of The Light And The Duration Of Its Action, The Exclusion Of All Light Except That Reflected By The ...
Collodion
Collodion. This Viscid Sohition Is One Of The Most Generally Used Articles In Photogenic Operations, And Is Remarkable As The Basis Of Processes Of Extreme Sensitiveness, And Giving Pictures Surpassing All Others For Generally Good Qualities. It Is A Solution Of Pyroxyline In Ether And Alcohol, Holding Also In Solution ...
Collodion Negative Process
Collodion Negative Process. In This Process A Negative Photograph Is Taken On A Glass Plate Coated With Collodion. The Various Operations Are As Follow :— To Prepare Iodized Collodion. This Is Made By Adding To Plain Collodion A Certain Quantity Of An Alcoholic Solution Of Iodide Of Potassium. To Make ...
Collodionized Paper Process
Collodionized-paper Process. In This Process A Negative Is Taken Upon A Sheet Of Paper Coated With Collodion. The Process Has Not Yet Been Extensively Practised, But It Appears To Offer Some Im Portant Advantages, In One Or Two Respects, Over Every Other Process Now Employed By The Tourist. It Will ...
Condenser
Condenser. The Condenser Is A Thick Convex Lens, Of Moderate Focus, Uncorrected Either For Spherical Or Chromatic Aberration, And Used For The Purpose Of Directing Light Through Any Transparent Object Intended To Be Copied, Either In The Copying Or Microscopic Camera, In The Manner Described In The Article On Copying. ...
Copying
Copying. This Term Is Used In Photography, When Manuscripts, Maps, Paintings, Engravings, And Works Of Art Of That Class Are To Be Reproduced. In Copying Black Marks Upon A White Ground, By The Collodion Pro Cess, It Is Generally Advisable To Have Recourse To Organic Matter In The Bath And ...
Cyanide Of Potassiitm
Cyanide Of Potassiitm. K Cy. The Principal Employment Of This Salt In Photography Is In Forming A Small Proportion Of Cyanide Of Silver With The Iodide, And In Fixing. The Former Of These Uses Is Not To Be Commended. As Met With In Commerce, It Often Contains Half Its Weight ...
Cyanotype Processes
Cyanotype Processes. These Are Certain Processes, Discovered By Sir John Herschel, In Which Cyanogen Is Employed. 1st Process. A Piece Of Paper Is First Washed With A Solution Of Ferrid-cyanide Of Potassium, (red Prussiate Of Potass,) And Dried. In This State It Is Of A Yellowish Colour And Highly Sensitive ...
Daguerreotype Process
Daguerreotype Process. By This Process A Direct Positive Is Obtained Upon A Silvered Metal Plate. It Was First Published By M. Daguerre, In Paris, In January, 1839. The Picture Is Produced By Means Of The Impalpable Filmes Of Iodine, Bromine, And Mercury, Acting On A Silvered Plate Which Has Been ...
Depth Of Chemical
Depth Of Chemical Focus. Suppose A Small Direct Pencil Of White Light To Be Refracted Through A Single Convex Lens. Since White Light Is Not Homogeneous, But Composed Of Rays Of Different Refrangibilities, The Pencil Will Be Decomposed By Refraction Through The Lens Into Pencils Of The Various Colours Of ...
Development
Development. It Is Somewhat Difficult To Give An Exact Defi Nition Of This Term, As Used In Photography. If It Is Defined To Be The Production Of A Visible Picture From An Invisible Impression, Then The Term Would Not Include The Case Of The Printing Processes In Which A Faint ...
Development Printing I
Development Printing. I. Chemistry Of Sun Printing.—printing On Paper Prepared With Chloride Of Silver May Be Taken As An Example. This Paper Is First Prepared With A Soluble Chloride 'of Sodium, Barium Or Ammonium ; It Is Then Brushed Over With A Solution Of Nitrate Of Silver Strong Enough To ...
Deviation
Deviation. When A Ray Of Light Is Refracted Or Reflected At The Surface Of Any Medium, And Follows A Different Course To That Which It Had Before, The Angle Through Which It Is Turned Out Of Its Original Path Is Called Its Deviation. For Instance, If Qr Be A Ray ...
Distortion
Distortion. When The Image Formed By A Lens On The Focussing Screen Of A Camera Obscure Does Not Satisfy The Conditions Imposed By The Rules Of Perspective, It Is Said To Be Distorted. Distortion Of The Image In The Camera Obstura Is In General Pro Duced By The Excentrical Incidence ...
Dry Collodion Process
Dry Collodion Process. If A Collodion Plate, Excited In The Usual Way, Is Allowed To Get Dry, Without Having Previously Washed Off The Free Nitrate Of Silver, The Yellow Layer Of Iodide Of Silver Dis Appears, And The Film Becomes Transparent And Insensitive. This Arises From The Fact That Iodide ...
Enamelled Photographs
Enamelled Photographs. In The "comptes Rendus" Of June 11, 1855, Various Methods Of Producing Enamelled Photographs Are Described By M. A. Lafon De Camarsac. The Following Translation Of This Article Is Extracted From The Journal Of The Photographic Society For September 21st, 1855 : " I Select For Grounds Either ...
Engraving Photographs Upon Glass
Engraving Photographs Upon Glass And Porcelain. A Process Of Engraving Photog-raphs Upon Glass And Porcelain Was De Scribed By Mr. Thomas Sims, At A Meeting Of The Photographic Society, On January 1st, 1857. The Following Is The Account Given By Him Of This Process :— " Wishing To Offer As ...
Equivalent
Equivalent. On Referring To The Table Of Elementary Sub Stances, The Reader Will Obsem That Against Every Substance A Certain Number Is Placed, Called Its " Equivalent," Or Sometimes Its " Atomic Weight." For Instance ; Silver Has The Equivalent 108, Iodine 126, Carbon 6, Sulphur 16, And So On. ...
Exposure
Exposure. The Exposure Of A Sensitive Surface To Light, Either In The Camera Or Pressure Frame, Is One Of The Most Important Features Of Every Photographic Process ; And We Shall Endeavour To Describe In This Place The Effects Due Both To Over And Under Expo Sure In The Principal ...
Fading
Fading. It Is Unfortunately By No Means An Uncommon Thing For Photographs To Become Altered By Time, Even When Preserved With The Utmost C,are. In The Case Of Daguerreotypes, Or Collodion Positives Or Negatives, Or Negatives Upon Paper, This Misfortune Is, However, Comparatively Rare ; But In The Case Of ...
Fluorescence
Fluorescence. This Term Has Been Introduced By Professor Stokes To Denote A Remarkable Property Possessed By Certain Sub Stances With Respect To Light, And It Has Been Adopted From The Fact That Fluor Spar Exhibits The Phenomenon In A Marked Degree. Suppose A Trough, The Sides And Ends Of Which ...
Fluoride Of Silver
Fluoride Of Silver Is Soluble Compound Which Does Not Crystallize. It Fuses When Heated, And Is Reduced By Exposure To Light. Focau, Lines. When A Small Oblique Pencil Is Reflected Or Refracted At A Spherical Surface, Or Refracted At A Plane Surface, The Reflected Or Refracted Pencil Does Not Come ...
Focimeter
Focimeter. This Is An Instrument Employed By M. Claudet For Finding The Chemical Focus Of A Lens Which Has Not Been Properly Achromatized. A Number Of Boards Are Arranged In A Spiral About A Horizontal Axis, At Different Distances, And Each Board Is Painted White, And Inscribed With A Black ...
Gall
Gall. Ox-gall.. The Bile Of The Ox. Bile Is A Secretion Which Is Separated From The Venous Blood In The Liver. It Is Supposed To Be A Saponaceous Compound In Which An Organic Acid Is Combined Uith Soda. Ox-gall Is Of A Dingy Green Colour, Transparent, And Viscid; Having A ...
Gamboge
Gamboge. A Gum Resin, Concreted From The Milky Juice Which Exudes From The Gambogia Gutta, And Guttafera Vera, Trees Native In Ceylon And Siam. It Consists Of About 85 Parts Of A Red Resin Soluble In Alcohol, And 15 Parts Of Gum. It Is A Valuable Pigment, And May Be ...
Giitta Percha
Giitta Percha. This Useful Article Is The Produce Of A Very Large And Lofty Forest Tree Called The Isonandra Gutta, Which Is Native In The Islands Of The Indian Archipelago. Some Of Its Properties Were First Pointed Out By Dr. W. Montgomerie In A Letter To The Bengal Medical Board ...
Gilding Dissolvent
Gilding Dissolvent. This Liquid Is Used For Obliterating The Images Which Have Been Fixed By Sel D'or Upon Dag,uerreotype Plates. Its Exact Composition Has Not Been Published, But It, No Doubt, Contains Nitro-hydrochloric Acid, Disguised In Some Way. A Mix Ture Of Salt And Dilute Nitric Acid, Or Of Nitre ...
Glycerine C4118
Glycerine. C4118 Or (gr. "urn, Sweet.) Glycerine Is Sweet Substance Which May Be Extracted From Fatty Bodies And Oils. In Its Purest Form It Is Obtained In The Following Marmer Take Equal Parts Of Olive Oil And Finely Ground Litbarge ; Put Them, Into A Basin With A Little Water, ...
Ground Glass
Ground Glass. A Sheet Of Ground Glass Is Generally Used For The Focussing Screen Of The Camera. It Should He As Finely Ground As Possible, And The Best Way To Secure This Is To Use Plate Glass Which Has Not Received The Final Polishing In The Manufacture. At Sheet Of ...
Heliographic Engraving
Engraving, Heliographic. The Processes Of Heliographic Engraving Have Not Yet Been Brought To Sufficient Perfection To Be Worthy Of More Than A Few Brief Remarks In This Place. M. Nicephore Niepce Availed Himself Of The Property Possessed By Bitumen Of Judeea, Of Being Rendere,d Insoluble In The Usual Menstraa By ...
Honey
Honey. A Sweet Viscid Liquor Extracted By Bees From The Nec Taries Of Flowers, And Deposited By Them, Apparently Without Under Going Chemical Change, In The Waxen Cells Of Their Comix3. Honey Is Of Two Kinds, Viz., Virgin Honey, And Common Honey. The Former Is That Which Flows Spontaneously With ...
Hydro Carbon
Hydro-carbon. Hydrogen And Carbon Combine In A Great Many Different Proportions, Forming Compounds Many Of Which Possess Considerable Interest. It Rarely Happens, However, That These Compounds Can Be Obtained Synthetically By Actually Mixing The Ingredients ; They Are In General Produc,ed By The Decomposition Of Organic Matters. Some Of The ...
Hydrochloric
Hydrochloric Acm ; H Cl.= 37. This Acid Is Sometimes Called " Muriatic Acid," And " Chlorhydric Acid." It Is Formed By Combining Equal Volumes Of Hydrogen And Chlorine, Which Unite With. Out Diminution Of Volume, The Result Being A Strongly Acid Gas. The Simplest Mode Of Effecting This Combination ...
Hydrometer
Hydrometer. An Instrument For Meastuing The Specific Gravi Ties Of Liquids. Its Commonest Form Is A Long Graduated Tube Loaded At The Bottom, And Allowed To Float In The Liquid To Be Tested, The Depth To Which It Sinks Being Indicated By The Scale. The Principle Of The Instrument Consists ...
I Albumenized Paper Printing Processes
I. Albumenized-paper Printing Processes. There Are Two Processes To Be Described Under This Head—a Sun Printing Process And A Development-printing Process. 1..the Sun-printing Process. To Prepare The Albumen.—take A Sufficient Number Of Fresh Laid Fowls' Eggs, Each Of Which Contains Nearly An Ounce Of Albu Men. Break Each Egg On ...
Imponderable Agents
Imponderable Agents. Light, Heat, And The Various Forms Of Electricity Are Called " Imponderable Agents," Because They Cannot Be Weighed. When The Philosopher Is Called On To Give A Definition Of Matter, He Replies, " Matter Is Whatever Can Be Proved To Possess Weight, That Is, To Be Subject To ...
Indigo
Indigo. This Valuable Dye And Pigment Is Of Vegetable Origin, And Comes Principally From India, Being Manufactured From The Leaves And Stems Of The Indigo Plant. There Are Also West Indian, Egyptian, And Arabian Varieties. Indigo Is Also Obtained From Woad. The Seeds Of The Plant Are Sown In The ...
Ink Printing Process
Ink-printing Process. By This Process Positive Prints May Be Obtained In Common Writing Ink. The Paper Is First Immersed In A Nearly Saturated Solution Of Bichromate Of Potass, And Dried In The Dark. It Is Of A Bright Yellow Colour. It Is Then Exposed To Light Under The Negative In ...
Instantaneous Pictures
Instantaneous Pictures. Photographs Obtained In A Frac Tional Part Of A Second Of Time Are Said To Be Instantaneous. There Is No Particular Process More Sensitive Than Any In Common Use By Which Instantaneous Pictures May Be Taken. Either The Ordinary Collodion Process In Its Most Efficient Working State, Or ...
Iodide Of Calcium
Iodide Of Calcium. Ca. 1=146. This Salt Is Obtained By Dissolving Carbonate Of Lime In Hydriodic Acid, Evaporating To Dryness, And Fusing The Residue, In A Close Vessel. When This Is Dissolved In Water And Evaporated, It Furnishes White Deliquescent Crystals. The Nitrate Of Lime Formed In The Nitrate Bath ...
Iodide Of Potassium Ki165
Iodide Of Potassium ; Ki=165. Iodine And Potassium Unite Energetically, Giving Out Heat And Light ; And Potassium Burns In The Vapour Of Iodine. The Result Of This Combination Is The White Anhydrous Salt—iodide Of Potassium. The Mode Of Producing This Salt Commercially Is To Add Iodine To A Solution ...
Iodide Of Silver
Iodide Of Silver. Ag. I = 234. Iodine And Silver Are Sup Posed To Combine Directly And Produce Iodide Of Silver, For If A Silver Plate Be Placed In A Bottle Containing Iodine And Left For A Short Time, It Is Tarnished With A Yellow Film Supposed To Be Iodide ...
Iodine
Iodine, (greek Taric Violet Coloured,) I=126. This Elementary Substance Is Contained In Minute Quantity In Sea Water, And Some Mineral But Enters More Largely Into The Composition Of Cer Tain Sea Weeds, Chiefly Found On The Western Coasts Of Ireland And Scotland; A Minute Trace Has Also Been Found In ...
And Buffing Buff
Buff, And Buffing. A Buff Is Used In The Daguerreotype Pro Cess, For Polishing The Silver Plate, And In The Glass Processes, For Polishing The Glass Plate. In The Former Process, It May Be Either A Hand-buff Or A Buffing-lathe. The Hand-buff' Is Made Of A Piece Of Deal About ...