114 HarrLey—An Investigation of the Connexion between 
Quantity of 
Strontiwn. 
(4) 0-001 gr. The bands are changed in intensity and width: thus we have 
6740 
(ech very feeble. By comparison with that of Hagenbach and 
a 6 : 
Konen’s spectrum it is observed that | oa fairly strong, must be 
ate arl a AW avers 6500| .. ihe 
included in the foregoing band, and 6410] fairly strong, is split 
(6310 6015 
fairly strong. 
(5) 0:0001 gr. Three bands in the red are feeble: 
oa 6500) 6115) 
6520 6410] 6015] 
The line \ 4608 also appears faint. 
(6) 0:00001 gr. The line ) 4608 is very faint. No bands. 
: 6360 
into two | l feeble, ee fairly strong. ‘The line \ 4608 is 
STRONTIUM CHLORIDE. 
Measurements of the bands more refrangible than \ 5890 in the flame spectrum 
of strontium chloride, in quantity equivalent to 0°5 gr. of strontium, compared 
with measurements made from the nitrate which gives the bands of the metal, and 
with C. M. Olmsted’s measurements of corresponding bands. 
Description of Speetrum. 
a nN 
( 5820 “ 5838 Hartley, Roy. Soc. Phil. 
737 Faint 812 Tian, 1894, vol. 185; 
698 Faint 791 and Roy. Soc. Pro- 
oe a 744 ceedings, 1907, vol. 79, 
56 702 p. 242. 
496 3 Boni 640 
Diffuse broad bands, Metal pro- ae Very faint. ag 
bably undergoing oxidation. ¢ 33 436 
So-called ‘‘ oxide bands.’’* 980 ett Very faint. 412 
ae Very faint. 
| Wo Very faint. 
lL pee Very faint. 
4608 An intensely strong line. 
* As with calcium and magnesium, these are metal bands, the metal undergoing oxidation.—Roy. Soe. 
Proe., vol. 79, p. 242. 1907, 
