844 SIB B. C. BBODIE ON THE CALCULUS OF CHEMICAL OPEBATIONS. 



3*289 

 Now the specific heat of tin is 0-05623. Hence A=^:^g23=^^'^ ' ^^ '^^ ^^ known 



from experiment that ^W=59. It may therefore be assumed that ^ W— A. 

 Hence (1) If A=W, f=l, andy2=l, y^=l. 



(2) If A=|, f=l, and3^2=l> ^1=2. 



(3) If A=^, f^=l, andy2=l, 3^1=4. 



Hence it appears that from these considerations also (whichever hypothesis be pre- 

 fen-ed) i/2=h and the symbol of bichloride of tin is a^x\- The symbol of tin is, from 

 these data, either «„ x\, or k*, between which values we have no means of selecting. 



Combinations of the Prime Factors a, |, ^, ;^, . . . . and *j. 



Name of substance. 



Tin. Hypothesis 1 



Tin. Hypothesis 2 , 



Tin. Hypothesis 3 



Protoxide of tin , 



Binoxi(}e of tin 



Hydrated stannic acid .... 



Protosulphide of tin , 



Bisulphide of tin 



Bichloride of tin , 



Tetrachloride of tia ...... 



Chloride of stannic dimetiiyl 

 Chloride of stannic diethj-l . . 

 Bromide of stannic diethyl . . 

 Iodide of stannic trinjethyl 

 Chloride of stannic triethyl 

 Bromide of stannic triethyl 



Stannic tetrethyl 



Stannic dimethyl-diethyl. . . 



Prime factor. 



Symbol. 



^r 



x,9 



x,6' 



a.''x-x-\ 



a'cox^, 

 a'^x^x^ 



a^^xX 



a'Vx, 



a'^x'x, 



Absolute weight, 

 in grammes. 



6-274 



5-274 



10-548 



21-096 



5-989 



6-704 



7-509 



6-704 



8-135 



8-448 



11-621 



9-788 



11-040 



15-018 



12-962 



10-749 



12-738 



10-459 



9-207 



Eelative we%ht 



69 



5» 

 118 

 236 



67 



75 



84 



75 



91 



94-5 

 130 

 109-5 

 123-5 

 168 

 145 

 120-25 

 142-5 

 117 

 103 



Symbol of Zinc. — It is known from experiment that one volume of zinc-ethyl, of which 

 the density is 61-75, can be decomposed into 5 volumes of hydrogen, 24 parts by weight 

 of carbon, and 32-5 parts by weight of zinc. 



Now, since 6 parts by weight of carbon are formed by the decomposition of one 

 volume of marsh-gas, putting yj as the number of volumes of zinc-ethyl decomposed, and 

 y.2 as the number of volumes of vapour of carbon formed in this decomposition. 



