REED — RELATION BETWEEN VALENCE & ATOMIC WEIGHT. 657 



Atomic weight 55.913 ± .012. 

 Fe is probably — 2 in 

 lUFe, hydric ferride. 



Fc is -f-2 in 

 FeO and all ferrous salts, 

 H^FeCy^ and all ferro-cyanides. 



Fe is 4- I ill 

 FC3O4, triferric tetroxide, 

 FcgC/j, ferroso-ferric chloride, 

 Fe3(S04)4, roemerite. 



Fe is +3 in 

 FcoO^ and all ferric salts, 

 HjFcCjg and all ferri-cyanides, 

 M^Fe,04 and all ferrites, 

 KFeS, and all thio-ferrites, 

 FeP, ferric phosphide, 

 FeAs, " arsenide, 

 Fe2S3, " sulphide. 



Fe is -}- 4 in 

 FeSj, iron disulphide, 

 FC3P4, triferric tetraphosphide. 



Ff? is +6 in 

 K.^FeO^ and all ferrates, 

 FeAso, lolingite. 



NICKEL. 



Atomic weight 57.928 i -022. 



N/ may be — i in 

 + 5 —1 

 PN«5, phosphorous pentanickelide. 



N/ is -j- 2 in 

 N/O and all nickel salts, 

 N/3P2, nickelous phosphide. 



N/ is 4- 3 in 

 N/2O3) nickelic oxide, 

 N/2(OH)e, " hydrate, 

 N/As " arsenide (kupfer- 



nickel), 

 Ni'Sb, nickel antimonide (breith- 

 auptite). 



Ni'is -{-4 in 

 N/S2, nickel disulphide. 



Atomic weight 58.887 ± .008. 



Co is -|- I in 

 C02S, cobalt subsulphide. 



Co is -|- 2 in 

 CoO and all cobaltous salts, 

 C03P2, cobaltous phosphide. 



Co is + I in 

 C03O4, tricobaltic tetroxide, 

 C03S4, linnseite. 



Co is 4-3 in 

 C02O3 and all cobaltic and ammo- 



nio cobaltic salts, 

 KgCoCjKe ^nd all cobalticyanides. 



Co is -}-4 in 

 C0S2, cobaltic disulphide, 

 C0262(NO3) (NH3) , ammonio- 

 * ^ " percobaltic 



nitrate. 



COFFER. 



Atomic weight 63.396.* 

 C« may be -|-i in 

 CwjO, copper suboxide, 

 C«yAs, algodonite. 



C« is -f- I in 

 Cu^O and all cuprous salts, 

 CajFeSj, erubescite, 

 Cu^As, domeykite 

 CwgN, cuprous nitride, 

 CwgP, " phosphide, 



C« is -j- 2 in 

 CmO and all cupric salts, 



— 2 

 CaH, cupric hydride, , . 



CwgPa, " phosphide, 

 C«3A52, " arsenide. 



Cm is + 4 in 

 C«02, copper dioxide. 



ZINC. 



Atomic weight 64.90 i .019. 

 Zn is -\- 2 in 

 Z«0 and all zincic salts, 



M. H. Daubigny, Chem. News, Nov. 23, 1883. SO3 = « 



