19 



4. Naphthalene, CioH 8 , eureil. -(Paranaphthaline, i 4 Hio, yoreul.) 



Chloronaphthaline. eureelad. 



Dichloronaphthaline, eurealed. 



Trichloronaphthaline, eurulid. 



Tetrachloronaphthaline, eurold. 



Hexachloronaphthalene, eurelead. 



Broraonaphthaline, eureelab. 



Dibromouaphthaline, eurealeb. 



Tribroraonaphthaline, eurulib. 



Tetrabromonaphthaline, eurolb. 



Perchloronaphthaline, eureid. 



5. CHLORIDES and BROMIDES of NAPHTHALINE, 

 Hydrochlorate of chloronaphthaline, 

 Hydrochlorate of chlorobromonaphthaline, 

 Hydrobromate of quadribromonaphthaline, 

 Bihydrochlorate of bichloronaphthaline, 

 Bihydrochl orate of bromochloronaphthaline, 

 Bihydrochlorate of terchloronaphthaline, 

 Bihydrochlorate of quadrichloronaphthaline. 

 Bihydrochlorate of bibromobichloronaphthaline, 

 Bihydrobromate of bibromobichloronaphthaline, 

 Bihydrobromate of terbromochloronaphthaline, 

 Bihydrobromate of quadribromonaphthaline, 

 Bihydrochlorate of bibromoterchloronaphthaline, 

 Bihydrobromate of pentabromonaphthaline, 



with GMELIN'S names 

 ioH 7 Cl HC1. 

 C 10 H 6 BrCl HC1 

 Ci H 4 Br 4 HBr 

 C 10 H 6 C1 2 2HC1 

 CioHeBrCl 2HC1 = 

 C 10 H 5 C1 3 2HC1 

 C 10 H 4 C1 4 2HC1 

 C 10 H 4 Br 2 Cl 2 2HCl = 

 C 10 H 4 Br 2 Cl 2 2 HBr = 

 C 10 H 4 Br 3 Cl 2 HBr = 

 C 10 H 4 Br 4 2HBr 

 ioH 3 Br 2 Cl 3 2HC1 = 

 CioH 3 Br 5 2HBr 



and formulae : 

 = eureiled. 

 = eureelabed. 

 = eurulb. 

 eureilod. 

 = eureilabid. 

 = eureelud. 

 = eureald. 

 = eurealebod. 

 = eurealedob, 

 = eurealadub. 

 = eurealb. 

 = eurulebod. 

 - euruleeb. 



Isomerism. By applying the principle of permutation in the arrangement 

 of letters, the same name is never given to metameric bodies having the same 

 ultimate composition. A few examples will sufficiertly prove the adaptation of 

 the new system to cases of isomerism. Each of the following ten bodies has 

 the empirical formula C 10 H 20 O a : 



Rutic or Capric acid. 

 Formiate of elayl, 

 Acetate of capryl, 

 Propionate of cenanthyl, 

 Butyrate of caproyl, 

 Yalerate of amyl, 

 Caproate of butyl, 

 QEnanthate of propyl, 

 Caprylate of ethyl, 

 Pelargonate of methyl, 



H CO C 9 H 18 0, 

 C 9 H 19 CO HO, 

 C 8 H 17 CO CH 3 0, 

 C 7 H 15 CO C 2 H 5 0, 

 C 6 H 13 CO C 3 H 7 0, 

 C 5 Hu COC 4 H 9 0, 

 C 4 H 9 COC5HHO, 

 C 3 H 9 COC 6 H 13 0, 

 C 2 H 6 COC 7 H 15 0, 

 CH 8 CO C 8 H 17 0, 



Larteochalt. 



eochal-artalt. 



eichal-eirtachalt. 



eechal-aftechalt. 



eachal-artichalt. 



uchal-artochalt. 



ochal-artuchalt. 



ichal-arteachalt. 



echal-arteechalt. 



achal-arteichalt. 



Each of the seven following compound ammonias has the same ultimate 

 composition, C 6 H 15 N : 



Triethylamine, 



Dipropylamine, 



Caproylamine, 



Amyl-methylamine, 



Butyl-dimethylamine , 



Butyl-ethylamine. 



Propyl-ethyl-methylamine, 



(C 2 H 5 ) 3 N. 

 (C 3 H 7 ) 2 HN, 

 C 6 H 13 H 2 N. 

 C 5 Hn CH 3 HN, 

 C 4 H 9 (CH 3 ) 2 N, 

 C 4 H 9 C 2 H 5 HN, 

 C 3 H 7 CaHs CHs 



echaliman. 



ichalemalan. 



eachilan. 



uchal-achelan. 



ochal-achaleman* 



ochal-echelan. 



ichal-echal-achalan . 



Two AMMONIA-COBALT METAMERS, empirical formula (H 3 N) 5 |fci : 



/^ 



Roseo-pentammonia-cobaltic chloride, ilanum-cobamid. 

 Purpureo-pentammonia-cobaltic chloride, yulun-cobamid. 



It has already been admitted that the improved names, as found in WATTES 

 New Dictionary, have the merit of more precision than the old nomenclature 

 in designating the proportions of non-metallic elements ; but this precision is 

 not always observed in that portion of the name defining the metal. For 

 purpose of comparison, a few of the names given as examples under the 



