XXXI. On the Properties of Electro-deposited Antimony (continued). By G. Goee, Esp 
Communicated by Professor Tyndall, F.B.S. 
Eeceived June 1, — Eead June 17, 1858*. 
a. Heat of discharge not due to cohesive action. 
59. I HAVE ah-eady shown to some extent that the change observed in electro-deposited 
antimony is not an instance of cohesive force exercised between the particles of the 
metal, because extensive fractures may occur in the mass (16, 17.) without producing 
or materially influencing the change ; and the cohesion of the particles may be inde- 
finitely reduced by triturating the metal to a very fine powder (30. 31. 32.) without a 
corresponding reduction taking place in the amount of heat evolved. Heat also, which 
decreases the cohesive force, increases the molecular energy (28.). 
60. To test the question further, I took a quantity of small pieces of unchanged 
antimony, averaging about ^th of an inch square and i^th of an inch thick, divided 
it into two portions, reduced one portion to a very fine powder in water at IS^Fahe., 
dried it in the open air, and finally with a gentle heat. I then placed 300 grains of the 
powder in a short test-tube closed by a cork, and surrounded by 400 grains of distilled 
water contained in a small glass beaker covered with cotton-wool ; and when the whole 
had acquired a temperature of 53°‘2 Fahe., I induced the change by means of a heated 
wire, and agitated the water until a thermometer in it indicated a maximum temperature 
of 72°’5 Fahe. = a rise of 19‘3 degrees. The powder was then removed, and a perfectly 
similar experiment made with 300 grains of the unpulverized fragments, in which case 
the temperature of 400 grains of water rose from 52°-8Fahe. to 72°-2Fahe. ~ a rise 
of 19 '4 degrees. 
61. I also took a freshly formed barf of the unchanged substance, perfectly free from 
grey antimony, fth of an inch thick and If inch long, weighing 278‘92 grains; and the 
same weight of a mixture of small fragments and particles of similar metal, and made 
two similar experiments to those described ; the weight of water in each experiment being 
403-78 grains, and the specific heat-value of the immersed portions of the thermometer 
and test-tube being =14-60 grains of water. With the bar the temperature of the 
water, &c. rose 20-05 Fahe. degrees; and with the fragments dioA particles it rose 20-00 
degrees. The bar lost 9-80 grains, or 3-51 per cent, of expelled vapour, 9*72 grains of 
which was found condensed in the tube in the form of a thick buttery substance, 
e-vldently terchloride of antimony. 
* Subsequently revised and condensed by the author. 
t Bars are formed by depositing the substance upon narrow strips of sheet silver, the edges of which are 
enclosed by vertical borders of white wax (see 90.) . 
