CLASSJFICA TIO .V. 29 



Spectrol'ogy. — The science of chemical analysis by means of 



lines of spectra as modified by the volatilization of different 



elements. 

 Stereom'eter (Gr. stereos, solid, and mefron, measure). — An 



instrument for determining the specific gravity of liquid 



bodies, porous bodies, and powders, as well as solids. 

 Stoichiom'etry. — That department of chemistry which con- 

 siders the numerical relations of atoms. 

 Sublima'tion. — An operation by which solids are changed by 



heat into vapor, and then condensed into a solid form again. 

 Sub'salt. — An oxysalt containing a less number of equiv^alents 



of the acid than of the base, or in which the latter is a 



suboxide. 

 Symbol. — An abbreviation of the name of an elementary body ; 



thus, ag is written for silver (argentum) ; pb for lead 



(plumbum). 

 Synthesis.— The uniting of elements into a compound, as of 



ox^'gen and hydrogen into water, — the opposite of analysis. 

 TJrinom'eter (Gr. ouron, urine, and metron, measure). — A small 



hydrometer for taking the specific gravity of urine. 

 Zymol'ogy (Gr. zume, ferment, and logos^ discourse). — The 



doctrine o^ fermentation. A treatise on the fermentation of 



liquors. 



Salts formed by the union of an acid with a base : 



Acetic acid Acetate. Malic acid Malate. 



Arsenic acid Arseniate. Hydrocliloric acid.. Muriate. 



Arsenioiis acid Arsenito. Nitric acid Nitrate. 



Benzoic acid Beiizoatc. Oxalic acid Oxalate. 



Carbonic acid Carbonate. Phosphoric acid Phosphate. 



Chloric acid Chlorate. Selenic acid Seleniate. 



Chromic acid Chroniate. Silicic acid Silicat(i. 



Citric acid Citrate. Succinic acid Succinate. 



Cyanic acid C^'anate. Sulphuric acid Sulphate. 



Formic acid Formate. Sulphurous acid Sulphite. 



Fulminic acid Fulminate. Tannic acid Tannate. 



Gallic acid Gallate. Tartaric acid Tartrate. 



Lactic acid Lactate. Uric acid Urate. 



CLASSIFICATIOiN^ 



Taxon'omy (Gr. taxis, an arranging, and nomas, law). — That 

 department of Natural History which treats of the laws 

 and principles of classification. 

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