488 A^^'^Messrsi' P1^5'ft»^ ^^^^^ Jo"le on 



the volume occupied by anhydrous salts. It will be observed 

 that they present some peculiarities. 



Nitrate of Potash, KO, NO5=101-3.— The halfof an equi- 

 valent of this salt, 50*65 grains, being dissolved in 1000 grs. 

 of water, gave an increase of ] 8*05 at 45°. 



KO, NO5, vol. in solution 36-1 



The same quantity of salt, 50*65 grains, thrown into tur- 

 pentine, caused a rise in the stem of 24*5, 24*4, 24*5 in three 

 successive experiments. 



Sp. gr. 



I. KO, NO5, vol. of salt 49-0 ... 2-067 



II. ... ... 48-8 ... 2-075""'* '•'■ 



III. ... ... 49-0 ... 2-067 



Mean . . 48-9 ... 2-070 



Nitrate of Ammonia, NH4O, NO5=80-3. — The volume of 

 nitrate of ammonia in solution was determined by dissolving 

 40-15 grains of this salt in 1000 grains of water. In one ex- 

 periment the increase in the stem was 22-5, the temperature 

 being 57° ; in a second the rise was 23'0 at 63°. 



I. NH4O, NO5, vol. in solution 45 



II. ... ... ^6^0 



Mean . . 45-5 



Half an equivalent of this salt, well-dried (40*15 grains), 

 on being immersed in turpentine produced an increase in 

 three experiments of 24*7, 24*5, 24*5. 



I. NH4O, N05,vol. ofsalt 

 II. 

 III. 



Mean . . 49*1 ... 1*635 



Nitrate of Soda, NaO, N05= 85-45. — On dissolving 85-45 

 grains, or one equivalent, of this salt in 1000 grains of water, 

 an increase of 27*1 was obtained, the temperature being 59° ; 

 but on repetition of the experiment at the same temperature 

 the increase was only 26*0. 



I. NaO, NO5, vol. in solution 27*1 

 II. ... ... 26-0 



Mean . . •iQ'B 



The half of an equivalent of this salt, 42" 72 grains, well- 

 dried, produced an increase on being thrown into turpentine 

 of 19-6 in three experiments and 19-5 in a fourth trial. 



