COPPER BROMIDE AND CALCIUM BROMIDE. 



229 



menced. The maximum of absorption appeared to have the position given 

 by 0.500,. This absorption was not complete, since a little light could be 

 seen at all points of the band, not excepting the maximum. Beyond this 

 band transmission rose to a maximum near 0.465/<, and then faded away to 

 nothing in the vicinity of 0.435/t.* The spectrum of the next solution in 

 order of concentration 2.542 was apparently more complex than that of any 

 other solution of the series. Transmission began at 0.737,, rose to a maxi- 

 mum at 0.652,, and then increased in intensity to 0.603/<. From this point 

 to about 0.545 the brightness of the spectrum seemed to remain constant, 

 but much less bright than at the wave-length 0.652/<. A definite absorp- 

 tion band, whose middle was approximately at 0.508/'., began near 0.545/<. 

 Beyond this band transmission rose to a maximum at 0.465/, and then 

 gradually faded out to zero value in the neighborhood of 0.445/<. 



TABLE 115. 



The transmission spectra of the solutioas just discussed were comparatively 

 bright, and extended over relatively wide regions of wave-lengths, while the 

 spectra to be described below were less intense and much prescribed. In 

 other words, the transition was rather abrupt. 



The solution of concentration 2.796 began to be transparent at 0.735/. The 

 spectrum rose to a maximum of intensity near 0.657/*, and then gradually fell 

 off to small intensity at 0.600/. Transmission was pretty uniform between 



*The numbers given for the extreme limits of transmission are obviously not very accu- 

 rate, and are merely intended to suggest the positions of these boundaries. 



