350 Results of Experiments 



No. of Conducts times T . Electro- 



Exp. better than meter 



8 sat. sol. 3-51 salt in 29 22 & 23 I 



15 4-38 22 & 23 i; 



11 sat. sol. 20-5 salt in 149 14 & 15 3 



12 19-6 22 & 23 I;; 



4 salt in 69 9-57 salt in 999 22 & 23 ij 



5 salt in 999 9-92 salt in 20,000 12 & 20 if 



13 salt in 149 17-3 salt in 2999 5 & 17 3 



14 16-7 18 & 19 if 



N.B. It is not said what water the solutions were made with. By the com- 

 parison of salt in 999 with salt in 20,000, it should seem either that they were 

 not made with distilled water, or that some mistake was made in the experi- 

 ment. 



690] In Jan. 1777, salt in 2999 conducted about 70 or 90 times better than 

 some water distilled in the preceding summer, or about 25 or 50 times better 

 than the distilled water used in the year 1776 *. 



Salt in 2999 conducted about 25 times better than salt in 150,000. 



691] Salt in 69 conducts 1-97 times better in heat of 105 than in that of 

 58tf. 



The proportion of the resistance of sat. sol. and salt in 999 to each other 

 seems not much altered by varying heat from 50 to 95 J. 



692] Salt in 150,000 seemed to conduct rather better than the same water 

 deprived of air by boiling in the same vial in which it was kept, and cooled 

 quick in water to prevent its absorbing much air. But the difference was not 

 more than might arise from error of experiment . 



693] Distilled water impregnated with fixed air from oil of vitriol and 

 marble conducted 2j times better than the same water deprived of its air by 

 boiling ||. 



694] Conducting power of other saline solutions compared with that of 

 salt in 29 of water ^f. 



Sal. Sylvii 1-08 



Sal. amm. 1-13 



Calc. S. S. -852 



Glaub. salt -696 



Quadran. Nitre -887 



F. alk. -819 



Spt. salt 1-72 



Oil vitr. -783 



D another parcel 1-12 



* [Art. 621.] f [Art. 619.] { [Art. 620.] 



[See Art. 624.] || [Art. 625.] f [Art. 626 and Note 34.] 



