Chemical Constitution of Saline Solutions. 271 
Measurements made at the top of the cell :— 
r 
Rays transmitted from » 627 to : : , : 584 
Absorption Band. : : ; . 584 to 486 
Rays transmitted from 436 6 : : : 365 
Measurements taken at the thin part of the cell :— 
Spectrum begins about . i ; ; : : 700 
Rays transmitted to . : ‘ : : : 552 
Absorption Band. : : : ‘ j . 552 to 514 
Rays transmitted from 514 to . ; ‘ : ; 342 
A plate taken with a feeble sun spectrum above the absorption spectra of 
CoCl,-6H,0, in aqueous solution at 20° C., gave the following measurements :— 
rN 
The solar spectrum commenced at. ; : 5 649 
The absorption spectra commenced at . : ; 645 
Rays transmitted to . ‘ : : ‘ : : 584 
Great Absorption Band  . ‘ : : : . 584 to 436 
Rays transmitted from A 436 to : : ; : 365 
A solution in water of CoCl,6H,O, saturated at 20° C., the spectra seen when 
the solution was cooling down from 60° C. gave the following measurements :— 
Thinner part of cell. r 
Barely perceptible transmission of rays from . ; 601 
W  o : 584 
Great Absorption Band. ‘ : : . . 584 to 436 
Weak transmission of rays from : . : 466 
to : 6 , : 337 
Thicker part of cell. 
Complete absorption of all rays to . 6 5 5 440 
Rays transmitted from 440 to . : 6 : . 342 
At or about 30° C. :— 
Spectrum begins feebly about . : : 5 : 638 
An Absorption Band discernible : : : . 634 to 627 
Rays transmitted from 627 to . . . é 570 
A second Absorption Band is observable, its strongest 
edge is at A 612, but it appears to extend a little 
beyond this : : ; : ‘ : . 620 to 612 
Rays transmitted to 6 : 5 : : 6 575 
Great Absorption Band. : : ; . 575 to 466 
Rays transmitted from A 466 to : : : : 332 
Measurements taken at the thicker part of the cell at a temperature about 
30° C. :— rN 
Rays transmitted from. ‘ : : : ‘ 601 
but very feebly to. : 6 : ; 589 
Absorption Band  . 5 : 3 : : . 589 to 450 
Rays feebly transmitted from . . 5 6 : 450 
Wo 0 . 6 . 443 
Strong spectrum transmitted to : : : . 334 
2P2 
