452 Mr. G. Gore on the Properties of 



thermo-electricity was in each case generated, and passed in a 

 similar direction. 



•13. By exciting the peculiar change in two pieces, weighing 

 upwards of 600 grains each, placed in the vicinity of the poles 

 of delicately suspended magnetic needles, no deflection of the 

 latter in cither case occurred. 



44. By taking two bars, each about 3 inches long, one of 

 amorphous antimony and one of the crystalline variety, connect- 

 ing their extremities with a galvanometer, and cautiously bring- 

 ing a small flame of a spirit-lamp within half an inch of their 

 remote and touching ends, the dark bar was found to be feebly 

 thermo-electro-positive to the gray one. A thin rod of changed 

 antimony was found, in a second experiment, to be weakly 

 thermo- positive to a large lump of gray metal. And in a third 

 trial, a large changed bar was positive to a bar formed by melt- 

 ing and casting deposited antimony. 



45. Both the gray, the changed, and the unchanged metal 

 acquired a coating of dendritic crystals of silver by immersion 

 in a solution of nitrate of silver. 



46. The following arc some determinations of the specific 

 gravity of the deposits : — 



Three specimens of unclianged 

 antimony. 



No. 1. 5-739 at 70° Fahr. 

 No. 2. 5-924 at 62 „ 

 No. 3. 5-944 at 62 „ 



Five bars of unchanged antimony. 



No. 



No. 

 No. 

 No. 



No. 8. 



5-766 at 60° Fahr. 

 5-769 at 62 „ 

 5-782 at 62 „ 

 5-7S5 at 62-5 „ 

 5-814 at 61-5 „ 



The bar No. 4 weighed 467-00 grains ; and by immersing it in 

 750 grains of distilled water at 60° F. and inducing the change, 

 it evolved a little chloride of antimony, and acquired a density of 

 5-818 at 60° F. The bar No. 7 weighed 456-9 grains; and by 

 "changing it in 836-6 grains of water at 63° F. (see 39), it ac- 

 quired a density of 5-862 at 62°-3 F. And the bar No. 8, changed 

 in the air, acquired a density of 6'186 at 61°-5 F. 



Four specimens of changed antimony. 



Ten specimens of gray antimony. 

 Fahr. 



Nos. 1 and 2 of the gray specimens were deposited from the 



