228 Scientific Proceedings, Royal Dublin Society. 
Copatt. (Plate XVII.) 
Spectrum 1 on this plate gives the lines of cobalt alone. 
2, 3, and 4 give those of strong solutions; and the others give 
the dilutionsas formerly. Like iron, manganese, and nickel, cobalt 
gives the same lines with the metal and strong solutions. The 
results of dilution are given in the table:— 
QUANTITATIVE SPECTRUM oF CoBaLT CHLORIDE. 
Intensity Intensity 
Wave-length. and Wave-length. and 
Persistency. | Persistency. 
4531-1 4o | 3412-8 7 
—-—— -10-——— 3405°3 Sy 
4469°7 lo ——- 15-17 —-— 
4121°5 8 3086-9 69 
4118-9 80 3072°5 6¢ 
eee ea, oy yee 
3995°5 8p 2694°7 Sw 
———-13-——— ———-22-—_ —— 
3894-2 10¥ 2663-6 Sy 
3873°2 10v —— 23-24 -——_— 
3845-6 10 2587-2 8 
ssa gest 2 2582°3 8x 
3502°4 8x 2580-4 Sy 
3489°5 10 2564-2 So 
3474°1 10x 9559°5 8x 
3465-9 8 
3453-6 Sy ae | 
3449-6 7p 9528-7 7x 
3443°8 7p 2525°1 7X 
8483°2 To 2519-0 8a 
CuemicaL Laporatory, 
Royvat CouLece oF ScrENCE, 
Dustin. 
