Electric Blue Print Making
Electric Blue-print Making, A Modern Process Of Wholesale Photographic Printing By The Aid Of Machinery, The Electric Light And The Blue-print (q.v.). One Of The Best Machines Is Continuous In Its Operation, And Is Fed By The Operator With Great Lengths Of Tracings And Blqe Paper In Much The Same ...
Electric Direct Current
Electric Direct Current, As Distinguished From The Alternating Current, Is So-called Because Of The Fact That It Travels In One Direction Along A Conductor. If This Con Ductor Joins The Terminals Of A Source Of Energy, As A Dynamo, The Current Is Said To Flow From The Positive Pole Of ...
Electric Farming
Electric Farming. The Greatest Agent For The Advancement Of Agriculture Is Electricity. It Is The Emancipator Of • The Toiler. A Motor Of Even Diminutive Dimensions Accom Plishes More Work Than A Man — At Less Ex Pense — Since The Power Developed By The Human Machine Is The Most ...
Electric Fishes
Electric Fishes, Several Quite Un Related Fishes Which Possess The Extraordinary Property Of Communicating An Electric Shock To Animals With Which They Come In Contact. The Organs Which Are The Source Of This Power Have Been Much Studied By Both Anatomists And Physiologists. They Are In All Cases—with The Possible ...
Electric Furnaces
Electric Furnaces. These Furnaces Are Devices For Localizing The Heat Of An Elec Tric Circuit And Utilizing It. In The Usual Tech Nical Use Of The Term It Signifies A Device Or Receptacle In Which A Comparatively High Tem Perature Is Developed For The Purpose Of Effect Ing A Chemical ...
Electric Heater
Electric Heater. If A Wire Of More Or Less Resistance Is Wound On A Frame, And A Current Sent Through, The Resistance Encountered By The Current Develops Heat, And This Is The Principle Of The Electric Heater. The Hot Wire Or Metal Is Surrounded By Some Non-inflam Mable Substance That ...
Electric Lighting
Electric Lighting. In 1800 Sir Humphry Davy Discovered That If Two Pieces Of Carbon Are Joined By Conductors To A Source Of Electric Current, And Such Pieces Momentarily Touched Together, So That The Circuit Is Complete And A Flow Of Current Established, Upon Their Separation For A Short Distance, A ...
Electric Machine
Electric Machine. An Understanding Of Induction Is Essential To An Appreciation Of Static Electricity. Static In Duction Is The Production Of An Electrical Charge Upon One Body By Another Body That Is Statically Charged. It Might Be Termed Electrical Influence. A — If The Circle A Becomes Charged By Friction, ...
Electric Storage Battery
Electric Storage Battery, The. Electrical Energy Is Developed In Com Mercial Quantity At The Present Day Almost Exclusively By Means Of A Dynamo-electric Machine, Driven In Turn By A Steam Engine, Gas Engine, Water Wheel Or Other Prime Mover. A Plant Of Either Of These Kinds Is Somewhat Complicated, So ...
Electric Storm
Electric Storm, A Sudden And Violent Change In The Normal Magnetic Currents Of The Earth, With Oscillations Of Potential, Interfering With The Action Of Telegraph And Telephone In Struments, Sometimes Suspending Their Opera Tion And Even Diverting The Current So As To Stop Trolley Cars; Called Also Magnetic Storm. Without ...
Electric Transmission Of En
Electric Transmission Of En Ergy, Long Distance. An Electric Trans Mission Of Energy Obviously Occurs When The Relay Of A Morse Telegraph Circuit, Or The Sensi Tive Mirror Used In Submarine Cable Telegraphy, Responds To The Feeble Current Impulse Origi Nated At The Transmitting End Of The Wire. It Is ...
Electric Underground Cables And
Electric Underground Cables And Conduits. In The First Attempts To Operate The Electric Telegraph, Over 60 Years Ago, Both In This Country And In Europe, The Wires Were Placed In Cables Underground; But Owing To Imperfection In The Methods Of In Sulating The Wires, As Well As In The Type ...
Electric Vegetable Garden Ing
Electric Vegetable Garden Ing. Experiments Carried On At The Govern Ment Agricultural Station At Amherst, Mass., Since 194 Show That The Use Of Electricity By The Farmer Is A Distinct And Valuable Stimulus To Nature And Exerts A Marked Influence Upon The Germination Of Seeds And The Grbwth Of Farm ...
Electric Vehicles
Electric Vehicles. The First Vehi Cles Operated By Electric Power From A Storage Battery Appeared In 1892, But They Failed To Attract The Attention Of The Public Until 1900, When The Very Superior Performance Of The Electric Carriage In A Winter Parade In The City Of Cleveland, Ohio, Gave Them ...
Electric Waves
Electric Waves, A Motion Or Dis Turbance Of The Ether Or Medium In Which Elec Tricity Manifests Itself And Appears To Move, Of A Character Similar To Light Waves, Of Varying Length, According To The Nature Of The Dis Charge But With A Velocity Similar To That Of Light. The ...
Electric Welding
Electric Welding. The Heat Of An Electric Arc May Be Employed In Fusing Or Welding Metals, Or The Heat Given Out In The Body Of Metal Acting As A Resistance To The Passage Of A Heavy Current, Without Any Arc Or Spark, May Effect That Result. The Arc Method Appears ...
Electrical Engineering
Electrical Engineering. Elec Trical Engineering Is Probably The Youngest Of All The Professions, For It Has Hardly Been Recog Nized As A Regular Profession For More Than 15 Years Past. As A Result, The Men Who Have Reached Prominence In It To-day Have Attained Their Positions From Widely Different Courses ...
Electrical Manufacturing Industry
Electrical Manufacturing Industry. The Conditions As To The Elec Trical Manufacturing Industries In The United States Are Fairly Well Revealed In The Sta Tistics Of The Bureau Of The United States Census For 1914, Giving The Latest Authentic Figures Available, Although These Can Be Supplemented By Later Data In Various ...
Electrical Measuring Instru Ments
Electrical Measuring Instru Ments. The Four Fundamental Electrical Quantities Which Are Being Constantly Measured In Electric Circuits Are Ohms, Amperes, Volts And Watts. Another Quantity Of Much Commercial Importance Is Watt Hours. The Usual Method Of Measuring Ohms, That Is, The Electrical Resistance Of A Circuit, Is To Use A ...
Electrical Units
Electrical Units. Two Systems Of Electrical Units Are In Use By Electricians, Known Respectively As The Practical System And The C. G. S. (centimeter-gramme Second). System. The Former Is Used In Electrical Engineering, The Latter In The Notation Of Electrical Science. The Practical System Is Sometimes Called The Q. E. ...
Electricity
Electricity, Atmospheric. Experi Ments Have Shown That There Is Always Free Electricity In The Atmosphere, Which Is Some Times Negative And Sometimes Positive, But Most Generally Positive, And The Intensity Of This Free Electricity Is Gteater In The Middle Of The Day Than At Morning Or Night And Is Greater ...
Electricity
Electricity Is A Form Of Energy (q.v.), Like Mechanical Energy Or Energy Of Motion, Heat, Radiant Energy (as Light), Chemical Energy, Etc. Electric Energy Is The Form Of Energy Most Recently Introduced Into Everyday Life And Is, Therefore, Not Yet Quite Familiar, So That We Still Ask, °what Is Electricity?" ...
Electricity From Heat
Electricity From Heat. The De Riving Of Electricity Directly From The Application Of Heat Is Interesting, Though It Has Not Proven Of Commercial Value. Two Different Metals In Contact Usually Show A Difference Of Potential. This Difference Is Most Marked In The Case Of Bismuth And Antimony. When Bars Of ...
Electricity_2
Electricity, Cause Of Death By. As Is Well Known, One Of The Most Impor Tant Safeguards Of The Human Body Against The Passage Of Electrical Currents Through It Is Its High Degree Of Resistance. This Degree Of Resistance, However, Is Subject To A Considerable Amount Of Variation. If The Skin ...
Electricity_3
Electricity, Experimental Researches In, By Michael Faraday (18.39-55). A Monu Mental Work In The Literature Of Science; Not Merely Recording The Results Of Experiment In What Tyndall Called Aa Career Of Discovery Un Paralleled In The History Of Pure Experimental Science," But Enriching The Record With Thoughts, And Clothing It ...
Electro Biology
Electro-biology, The Science Which Treats Of The Electric Currents Developed In Living Organisms; Also The Department Of Knowledge Which Treats Of The Influence Or Control Over The Feelings, Thoughts And Actions Of A Mesmerized Person. Very Simple Powers Of Observation Show That The Motions Of A Man's Body Are Under ...
Electrochemistry
Electrochemistry. That Branch Of Chemistry Which Treats Of The Utilization Of Elec Trical Energy To Facilitate Or Carry On A Chemical Reaction Is Known As Electrochemistry. This End May Be Accomplished In One Of Three Ways: By Electrolysis, By Electrothermal Action, Or By The Discharge Of Electricity Through Gases. Con ...
Electroculture Of Plants
Electroculture Of Plants, The Employment Of Electric Light In Agri Culture And Horticulture. It Was Determined At The Agricultural Experiment Stations Of Cornell University And Of West Virginia, In Experiments Made With The Arc And The Incandescent Lights, Respectively, That Cer Tain Crops Are Forwarded By The Light. The Most ...
Electrolysis
Electrolysis. With Respect To Their Ability To Conduct Electricity, All Substances Are Divided Into The Two General Classes, Conductors And Non-conductors; There Is, However, No Hard And Fast Boundary Line Between The Two, But A More Or Less Gradual Merging From One Into The Other. The Conductors Are Again Divided ...
Electrolysis Of Gas And
Electrolysis Of Gas And Water Mains. In The System Of Street Railway Traction In Which An Overhead Trolley Wire Is Employed, With Direct Current, In Which The Tracks Are Utilized As A Return Circuit For The Current To The Power-house, It Has Been Found That Damage Has Almost Invariably Ent ...
Electromagnetism
Electromagnetism. The Art R Process Of Magnetizing By Means Of An Electric Current, As Distinguished From So-called Natural Magnetism As In The Lodestone, Or Transient Magnetism, As Established In A Wrought-iron Bar. A Magnet Not Only Attracts Steel And Iron In A Less Degree, But Cobalt, Nickel, Manganese, Cerium And ...
Electrometer
Electrometer, An Instrument For Determining Difference Of Electrostatic Poten Tial (or Electric Charge) Between Two Charged Conductors. The Electroscope (9.v.) And Cou Lomb's Torsion Balance Are Pnmitive Forms. The Attracted-disc Electrometer Was Designed By Volta And Developed By Snow-harris. It Con Sists Of A Battery Or Leyden Jar To The ...
Electron Theory Or Corpus
Electron Theory Or Corpus Cular Theory. The Physical Theory That The Atoms Of Bodies Are Composite Systems, Consisting In Part (at Least) Of Corpuscles Of A Still Higher Order Of Minuteness. The Theory Has Heretofore Concerned Itself Mainly With The Study Of One Special Form Of Corpuscle, Which Is Exceedingly ...
Electroplating
Electroplating, The Art Of Plating Or Covering Solid Objects With A Coating Of Metal By Electro-deposition. This Is The Most Common Method Of Applying Silver Or Gold Plate For Ornament, Or Copper Or Nickel Plate, As For Rendering An Article More Durable. Given A Solution Of The Salts Of A ...
Electroscope
Electroscope, An Instrument For De Tecting Or Determining The Presence Of Elec Tricity Upon A Conductor, And Showing Whether It Is Positive Or Negative. It Has Many Forms, Of Which The Simplest Consists Of Pith Balls Hanging From Silk Threads In A Dry, Closed Glass Case. On Contacting With An ...
Electrostatics
Electrostatics, That Branch Of Elec Trical Science Dealing With Electricity At Rest, Or Static; Opposed To Electrodynamics, Which Deals With Electricity As A Force, In Action. In The Period Of Early Research The Electrical Phe Nomena Produced By Friction Came To Be Called Static Electricity, And It Has Been Convenient ...
Electrot
Electrot I F Erapeutics. Up To The Time Of Franklin's Historic Kite Ex Periment (see Electricity, Atmospheric) The Identity Of The Electricity Developed By Rubbing And By Electric Machines (frictional Electricity), With Lightning Had Not Been Generally Lished. Dr. Wall 1807, Abbot Nollet, Bee, Gray And Winckler Had Indeed Suggested ...
Electrotype
Electrotype, A Metallic Copy, Made By Electro-deposition, A Form Of Type, A ((cut,' Engraving, Etc., And Manufactured Into Proper Shape For Printing. Wax Is Heated In A Kettle, Poured Out On A Molding-case And Placed In A Press To Receive A Reverse Impression Of The Form, Engraving, Etc. The Face ...