between Spectra and Atomic Weights, 



205 



From these 



numbers we get for the atomic 



wei 



by combining- 













(a) 



& (c) 



65-44 







(a) 



& (d) 



(55-69 







(a) 



& (/) 



65-48 







(a) 



& (//) 



65-17 







(a) 



& (A) 



64-93 







(a) 



& (I) 



65-28 







(a) 



& (./) 



65-15 







(«') 



& (A) 



6512 







(a) 



& (J) 



65-16 







(ft) 



& <e) 



(34-69 







(*) 



& (e) 



(34*77 and so on. 





Cad tn i un>. 





Zinc. 





(m) 



19655-8 



10 r 



21170-0 



10 r 



(n) 



20826-7 



10 r 



21591-6 



86 



(a) 



28840-2 



10 r 



24371-4 



2 



(P) 



30301-9 



4 



24869-7 



4 





(m) 



&' («) 



67-08 







(n) 



& (o) 



65-38 







in) 



& (;>) 



65*76 







(m) 



& (#) 



65-98 







Cadmium. 





Zinc. 





(?) 



27669-1 



8r 



29885-1 



10 r 



(r) 



29370-4 



10 r 



30456-0 



8>- 



zinc 



(?) & ( r ) 8"i ve 64-78 for the atomic weight of zinc. 



Example 2. From the atomic weight of mercury, 119 "7], 

 to calculate the atomic weights of cadmium and zinc. 

 The following are the lines assumed to correspond : — 



(«) 

 (ft) 

 (<0 

 id) 



Mercury. 

 16250 

 18366-4 

 20156-3 

 20334-0 



Cadmium. 



10 

 10 r 



'2b 

 66 



(a) & 



(6) & 

 (6) & 



20826-7 

 21368-7 

 214404 



10 r 



10 r 



Sb 



Ziuc. 

 21359-5 

 21591-6 



10 r 



8b 



(ft) 



(d) 



(?) 



give 66-13 for zinc, 

 give 111*45 for cadmium, 

 ffive 109-89 for cadmium. 



(e) 20334-0 6 6 

 (/) 24037-4 46 



(g) 25578-2 

 (k) 29828-1 

 (0 30245-9 



In 

 46 

 16 



(e) & (i) give 



(«) & iff) „ 



(«) & (/) „ 



(0 & W » 



27669-1 8 r 



28840-2 10 r 



293704 ]0r 



30654-4 10 r 



30734-9 86 



29885-1 10 r 



:^2^r\) 8 r 



30269-2 8;- 



30456-0 8 r 



111-06 for cadmium. 



113-7 for cadmium and (So-^ for zinc. 



112-3 



110-1 



