450 Mr. G. Gore on the Properties of 



by means of a disc of antimony 2\ inches diameter, a scaly de- 

 posit of bright bhick metal was obtained^ possessing the usual 

 thermic property. 



33. In every case where the deposited metal was dark and 

 shining, it evolved heat by the exciting causes, and under the 

 conditions named ; and in every case where it was gray and cry- 

 stalline, it would not evolve heat. 



34. The physical properties of the metal appear to be closely 

 connected with the condition of the liquid ; for in every case 

 where the latter was sufficiently changed, whether by alteration 

 of chemical composition, of density, of temperature, or of the 

 electric power, a change occurred in the colour and brightness 

 of the deposit; at the same time, by experimentally examining 

 the influence of each of these circumstances separately, I did not 

 find the peculiar state of the metal to be invariably connected 

 with any one of them. 



35. On iunnersing a piece of the unchanged metal in mer- 

 cury, and applying heat very gradually, it suddenly changed 

 with great force at a temperature of about 250° F. 



36. A deposit, consisting of 279'5 grains of amorphous anti- 

 mony and 101-5 grains of the gray variety, was formed upon a 

 spherical bulb of a thermometer, and, after well washing and 

 drying, was wrapped in cotton-wool and touched with a small 

 heated wire : it at once changed ; and the mercury rose from 

 75°*2 F. to 275°'2 F. in twenty-eight seconds. The diameter of 

 the glass bulb was ^|nds of an inch. 



37. A second deposit, consisting of 50-l'49 grains of dark 

 antimony, formed upon the same bulb, and treated in a similar 

 manner, raised the teoiperature of the mercury from 75° F. to 

 445°'0 F, in 1 minute 40 seconds. The thickness of the layer 

 of metal was ^^th of an inch ; and by the great heat evolved it 

 acquired a dull gray aspect, similar to the gray variety. 



38. A cylindical bar of the amorphous metal, about i an inch 

 in diameter, formed upon a rod of grain tin ^th of an inch thick, 

 when changed by tlie momentary application of a heated wire, 

 evolved sufficient heat to melt the tin completely, which ran out 

 through a crack in the antimony, and remained fluid a short 

 tijne. A bar of bismuth, y^ths of an inch thick, coated to about 

 |t1as of an inch in diameter, did not melt by the change. 



39. By immersing a perfect bar of the dark variety, weighing 

 45G'9 grains, in 836'6 grains of distilled water, contained in a 

 large thin glass tube wrapped in cotton-wool, immersing the 

 bulb of a tliermometcr in the water, and allowing the whole to 

 acquire a uniform temperature, then inducing the change by 

 momentary contact of a heated wire, and stirring the water to 

 render it uniform, the temperature of the water rose from 03° 



