The Alkaloids And Their
The Alkaloids And Their Preparation.-of The Alkaloids Present In Cinchona Barks, The Four Possessing Remedial Value Are—stated In Order Of Merit—quinidine, Quinine, Cinchonidine, And Cinchonine. Their Relative And Total Proportions Are Each Subject To Great Variation, In Fact No Two Samples Of The Bark Are Alike. Until Recently, Quinine Was ...
The Manufacture 1
The Manufacture. 1. From Alum Rock.—this Rock, Which Occurs In The Volcanic Districts Around Naples, And At Muszag In Hungary, Is Composed Principally Of Silica And Sulphate Of Alumina. Analyses Of Four Samples Taken From Different Places Have Shown It To Have The Following Composition :— The Rock Ie Piled ...
The Raw
The Raw Materials.—in Former Days, Paper Was Manufactured Exclusively From Rags, Either Linen Or Cotton ; But The Increased Demand For It, For Printing And Other Purposes, Has Made It Absolutely Necessary That Some More Abundant Source Should Be Found. Paper Is Composed Chiefly Of Cellulose, In A More Or ...
The Raw Material A
The Raw Material.-a Few Remarks At This Point Upon The Nomenclature, Countries Of Produc Tion, Varieties, Characteristics, And Mechanical Structure, Of The Raw Material Of The Cotton Industry, Will Obviate The Necessity Of Much Repetition In Subsequent Stages, And Enable The Reader To Compre Hend More Readily The Different Points ...
Thibet Cashmere
Cashmere, Thibet, Or Shawl Goat.—this Variety Of The Domestic Goat Is Considerably Larger Than The Angora Kind. Like The Latter, Its Coat Is Composed Of Two Materials, But It Is The Under Growth That Here Forms The Commercial Article. It Is Beautifully Soft, Silky, And Down-like, And Of A Pretty ...
Throwing Witeel8 And
Throwing-witeel8 And Lemnas.—the Essential Part Of A Throwing-wheel Ie A Horizontal Diec, Rigidly Fixed To A Vertical Spindle. Rotary Motion May Be Communicated To The Apindle In A Variety Of Ways. Fig. 1111 Represents Probably The Oldest Form Of Throwing-wheel Not Turned Actually By Tho Thrower's Hand. The Large Wheel ...
Timber Fe
Timber (fe., Bois Dceuvre; Ger., Nutzholz). Properly Speaking, The Term " Timber " Is Eonfined To Those Kinds Of Wood Which Are Eligible For Building Purpoaes ; But In The Preaent Article, It Will Be Extended To Embrace All Useful Woods, Except Such As Have Been Already Deseribed Under Drugs ...
Valuation Of Ores And
Valuation Of Ores And Minebals.—having Ascertained By Examination The Nature Of The Mineral, The Assayer Now Proceeds To Examine It Further With A View To Determining Its Value For Smelting Or Other Extracting Purposes. The Methods Employed To Effect This Are Very Numerous. In Many Cases, The Whole Of The ...
Varnish Fr
Varnish (fr., Vernis ; Ger.. Firniss). A " Varnish" Is Any Substance Which, When Applied To The Surface Of Au Object, Leaves On That Surface A Continuous, Smooth, Imperviona Coating, Whose Functions Are :—(1) To Increase The Lustre Snd Polish Of That Surface, And, Hy Obliterating Its Asperities And Filling ...
Vegetable Oils And Fats
Vegetable Oils And Fats [a. Fatty Or Fixed]. (fa. Hut D'amandes).—the Almond (see Fruit—almonds, P. 1022) Yields Two Oils : An Essential Or Volatile Oil, Described In A Separate Section (see P. 1416); And A Fixed Or Fatty Oil, Now To Be Discussed. This Latter Is Afforded By Both Sweet ...