Chemical Constitution of Saline Solutions. 



271 



Measurements made at the top of the cell : — 



X 



Eays transmittecl from \ 627 to .... 584 



Absorption Band ....... 584 to 436 



Rays transmitted from X 436 to , . . . 365 



Measurements taken at the thin part of the cell : — 



Spectrum begins about ...... 700 



Eays transmitted to . . . . . . . 552 



Absorption Band ....... 552 to 514 



Eays transmitted from 514 to 342 



A plate taken with a feeble sun spectrum above the absorption spectra of 

 CoCh'GHjO, in aqueous solution at 20° C, gave the following measurements: — 



X 



The solar spectr\im commenced at ... . 649 



The absorption spectra commenced at . . . 645 



Eays transmitted to . . . . . . . 584 



Great Absorption Band 584 to 436 



Eays transmitted from X 436 to . . . . 365 



A solution in water of CoClo-GHoO, satui'ated at 20" C, the spectra seen when 

 the solution was cooling down from 60° C. gave the following measurements : — 



Thumcr part of cell. 



Barely perceptible transmission of rays from 



to 

 Great Absorption Band .... 

 "Weak transmission of rays from 

 to 

 Thicker part of cell. 

 Complete absorption of all rays to 

 Eays transmitted from 440 to . 



X 



601 

 584 

 584 to 436 

 466 

 337 



440 

 342 



At or about 30° C. :— 



Spectrum begins feebly about . 

 An Absorption Band discernible 

 Eays transmitted from 627 to . 

 A second Absorption Band is observable, its strongest 



edge is at X 612, but it appears to extend a little 



beyond this 

 Rays transmitted to 

 Great Absorption Band 

 Eays transmitted from X 466 to 



Measurements taken at the thicker part of the cell at a temperature about 

 30° C. :— ^ 



Eays transmitted from 601 



638 

 634 to 627 



570 



620 to 612 



575 

 575 to 466 



332 



but very feebly to 



Rays feebly transmitted from 

 to 

 Strong spectrum transmitted to 



589 

 589 to 450 



450 

 443 

 334 



2P2 



