456 



Prof. Guthrie on Drops, 



[Reces, 



Solution of Nitrate of Potash in water. — Nitrate of potash was the next 

 soUd examined, on account of the probable non-existence of hydrates. 

 Seven solutions of nitrate of potash were made of the following strengths 

 by weight : — 



(1) 22 of water to 1 of nitrate of potash. 



(2) „ „ „ 2 



(3) 

 (4) 

 (5) 

 (6) 

 (7) 



These solutions were made to drop from the ivory sphere at the rate of 

 ^^=2". In each instance four batches of drops, of 30 each, were weighed. 

 In the following Table the mean results only are given. 



Table VI. — Solutions of Nitrate of Potash. 



T=28° C. 

 Radius of sphere =22-1 millims. 



1. 



Solution 

 HO 



KNO3 



2. 



Mean weight 

 of single drop. 



3. 



Specific gravity 

 by experiment. 



4. 



Relative size 

 of single drop. 



5. 



Weight of KNOe 

 in a drop. 



Water 











22 

 



018517 



10000 



018517 



•00000 



22 

 1 



018613 



10164 



018314 



00846 



22 

 2 



0-17908 



1-0341 



017318 



-01628 



22 

 3 



017714 



1 0511 



16853 



•02411 



22 

 4 



0-16917 



1-0680 



015840 



-03075 



22 

 5" 



17805 



1-0832 



016439 



•04047 



22 

 6 



18254 



1-0987 



0-16618 



•04978 



22 

 7 



0-18611 



11130 



0-16723 



•05921 



Hence it appears that on the addition of the first quantities of nitre 

 (t* ^* ^^^^ ^^^^ diminished. Afterwards —y 



