Peiknyl
Peiknyl Violets.—in The Purification Of Di-phenyl-rosanilinc Blues, Blue And Violet Colouring Matters Are Obtained. The Blue Obtained By Heating Equal Parts Of Rosaniline And Aniline For Four Hours At 149°-160° (300°-320° F.) Is, Whilst Being Boiled With Dilute Muriatie Acid (1 Acid To 9 Water), Freed From The Unaltered Bases, ...
Pernambuco Or
Pernambuco Or Mangabeira.—the Mangaba, Mangabeira, Or Mangabiba Tree (ffancornia Speciosa), A Native Of The High Plateaux Of S. America, Between 10° And 12° S. Lat., At 3000-5000 Ft. Elevation, Affords A Kind Of Rubber. The Inhabitants Of Pernarnbuco Are Now Developing The Supply Of This Article, Which Is Collected By ...
Perry Fr
Perry. (fr., Poire ; Ger., Birnwein.)—perry Ia Another Wholesome Beverage, Reeeruhliug Cider, And Made From Pears In The Same Manner That Cider Is Made From Apples. The Harsher Sorts, Or Those That Are Too Tart For Eating Purposea, Make The Best Perry. The Manufacture Of This Drink Is Exactly Similar ...
Photographic
Photographic Instriiments.—without The Camera And Its Lens, The Majority Of Photographic Processes Would Be Practically Useless. The Photographic Camera Obscura—dark Chamber—with Its Image-forming Lens, May Be Likened To The Human Eye, Whose Retina Finds Its Mimicry In The Sensitive Photographic Plate Upon Which The Image Falls, And Is Impressed. The ...
Photography 1537
Photography. 1537 Developmcnt.—after Exposure In The Camera, The Plate Is Carried To The Dark Room, And There Taken Out Of The Slide. No Visible Change Will Be Observed On The Plate. The Image Is Impressed, But It Is Latent, And May Be Evoked By Pouring Over The Film A Solution ...
Pigment
Pigment Style.—the Colours Employed In This Style Are Not Soluble Dyes, But Insoluble Colours Or Pigments, Which Are Fixed Upon The Fibre By Various Mediums. This Style Has Of Late Been Much Improved, And Offers The Advantages Of Solidity And Permanence, Combined With A Lightness And Brilliance Equalling, In Many ...
Pigments And Paint
Pigments And Paint. Pigments (fs., Pigments; Ger., Furben).—the Term " Pigments" Is Applied To Those Colouring Matters Which Are Mixed In A Powdery Form With Oil Or Other Vehicle For The Purpose Of Painting. They Differ In This Respect From The Dyestuffs (see Coal-tar Products, Pp. 641-684, And Dyestuffs, Pp. ...
Preparation
Preparation. —the Preparation Of The Coffee Necessitates The Erection Of Extensive Buildings And Ma,chinery ; For These No Specific Plan Can Be Given, Because Much Depends Upon The Size And Situa Tion Of The Esta,te, And Much Upon The Kind And Degree Of Preparation Contemplated. The 4site Chosen For The ...
Prepared Perfumes
Prepared Perfumes. Extracts Or Essences.—the Simplest Form Of Prepared Perfume Is The Extract Or Essence, Consisting Of A Solution Of The Principle In Rectified Alcohol. Some Are Mere Artificial Compounds, Imitating The Odour Of The Substance Whose Name They Bear. The Chief Extracts Are Prepared As Follows : Ambergris.—()) Ambergris, ...
Printing
Printing And Engraving (fa., Imprimerie Et Gravure ; Gen., Buchdruckerkun,st Und Stecherei). In The Present Article, The Terms "printing " And "engyaving" Will Be Extended To Embrace The Following Subjects :—letter-press Printing; Printing In Colours, And Chromo-lithography ; Type Writing ; Autographic Processes (manifold Writers); Engraving On Wood, Eopper, Steel, ...