62 



SI tidies on Solution. 



FERRIC AMMONIUM SULPHATE IN WATER. 



Twelve solutions were prepared, varying in concentration from c= 1.0 

 to c = 0.10. The absorption curves show that the aqueous solutions of 

 ferric ammonium sulphate possess a broad, rather feeble absorption 

 band just beyond the visible red, whose maximum is at 842/zju, and 

 become transparent beyond this. The transmission curve of an aque- 

 ous solution of this salt has been roughly drawn in this region of the 

 spectrum by Coblentz 1 and by Nichols. 2 The A c curves for 605^ 



TABLE 25. Ferric Ammonium Sulphate in Water (Fig. 23). 



. Bureau of Standards, 7, 619 (1911). 



2 Phys. Rev., 1, 1 (1S96). 



