ox CHEMICAL NOMRNCLATUUK. 



43 



i net ion 

 that of 

 for this 

 .'s not, 

 it mild 

 iiate of 



L>s. 



id yet 

 jisieif's 

 Jiel and 

 (highly 

 prcury. 

 some 



clicinifltfl oxy-, bv otliors hyperoxynmriato. Thomson also calls 

 nicrcnric nitrate, oxynitrate, ami says tliat tm addinj^ hot water to it an 

 insoluhlo subnitrato and a soluble supornitrato are formed. 



1811.— In Kliiprolh a. ' WolfFs ' Dictionary of ChemiHtry ' (Fronoli 

 tranH.), wo find tlio name.s sulphate acide do potasso, nulphato dti k-v 

 oxidulo (=FoSO,) ; for tbo two pota.ssium carbonates, the names carbonate 

 sature and nonsatun'-. 



1811. — Berzelius ' nses entirely distinct means of denoting tho two 

 classes of salts with which wo have been deali*^ To mark the degree 



of oxidation of tlio base of a salt, ho adds tht crmi nation -ou.s, or -ic, 

 to tho name of the metal — e.(j. nitms mcrcurosus and nitras morcaricns., 

 To denote tho degree of acidity or basicity of a salt, he prefixes super- 

 or enb-, to tho name denoting tho acid. From his language, it seems 

 as though ho had invented this method independently. In tho cases 

 where more than one acid or basic salt is found, he denotes tho most acid 

 salt by the adjective supremus, and tho most basic by infimus, e.r/. — 



Superoxalas kalicus supremus. 

 Subnitras plumbicus infimus. 



1829. — In his later works — e.t/. in tho French edition of his Treatise, 

 1829 — he makes a difl'erence in tho nomenclaturo between haloid and 

 araphid salts. In the case of acid haloids, he adds the \\ord acid to tho 

 name of tho salt, a.tj. — 



Fluoruro potassiquc acide. 

 Basic salts of this class are named thus : — 



Chlorure plombiquc bibasiqnc. 



,, „ tribasique, &c. 



In the case of acid aniphid salts, ho drops the word acid, but prefixes to 

 the name of the acit' a suffix indicating the number of acid molecules, 

 e.;/.— 



Bisnlphato sodique. 



Zweif'ach phosphorsaures natron. 



Basic salts are named thus : — 



Sous-sulphate trialuminiquc. 



1827. — A somewhat similar system is adopted by Thenard.- He 

 introduces into tho name of each salt the full name (accordiog to 

 Thomson's system) of the oxide suppo.sed to exist in it, thus: — 



Sous-sulphate de deutoxide de mercure. 



All these attempts at naming acid salts Avere founded on a false idea 

 of their composition, inasmuch as it was not known that hydrogen is a 

 constituent of bisulphate of potash. Thus in Turner's ' Chemistry ' wo 

 find the formulce : — 



Sulphate of potassa, KO + SO3. 

 Bisulphate „ KO + 2SO3. 



' Journal de Plajgiqve, vol. Ixxii. p. 2G6. 

 « Trait 6, 5th ed. 1827. 



