inj. G. GOEE ON THE PEOPEETIES OF ELECTEO-DEPOSITBD ANTIMONY. 801 
influences is great in relation to the amount of heat to be discharged the action is 
giaaual, but if it is small the action is sudden. 
d. Total amount of heat evolved hy the change. 
73. The follomng determinations were made of the total amount of heat evolved 
uring the change. In each instance the metal was contained in a fine brass gauze 
basket with a lid, placed in a glass tube immersed in the water of a small calorimeter, 
and Its heat was discharged by contact of a small heated wire momentarily introduced 
thi ough a hole in the cork of the tube and in the lid. The water was constantly stirred, 
an It occupied about nine minutes in attaining its maximum temperature. The calcu- 
lations include the heat absorbed by the basket, the immersed portions of the tube and 
tiermometer, the water, and the metallic mass; reckoning the terchloride of antimony 
an actual metal together, i. e. as one mass, possessing a mean specific heat of 0-06312 
grams. 
1. 300 0 
2. 350 0 
3. 3500 
4. 350 0 
5. 350-0 
6. 300-0 
7. 300-0 
8. 300-0 
9. 272-42 
10. 400-0 
11. 251-92 
Evolved sufficient heat to raise its own weicrht 
of antimony, of specific heat 00508. 
of coarse granules, deposited 1 day 666-27 Faiir. degrees ; and lost 
of coarse granules, deposited 2 days 662-38 Fahe. degrees ; and lost 
of coarse granules, deposited 2 days 664-64 Fahr. degrees ; and lost 
of coarse granules, deposited 2 days 657-95 Fahe. degrees ; and lost 
of coarse granules, deposited 3 days 620-29 Faiir. degrees ; and lost 
of thin pieces, deposited 1 day 705-89 Faiir. degrees; and lost 
of fine powder, deposited 6 weeks ... 602-84 Fahr. degi-ees; and lost 
of thin pieces, deposited 6 houi-s 651-78 Faiir. degrees ; and lost 
a bar, deposited 1 day 628-70 Faiir. degrees; and lost 
of thin pieces, deposited 3 hom-s 655-35 Faiir. degrees; and lost 
^ 633-06 Faiir. degrees ; and lost 
grains. 
10- 81 of expelled vapour 
12-74 of expelled -vapour 
12-52 of expelled vapour 
12-00 of expelled vapour 
12-49 of expelled vapour 
11- 13 of expelled vapour 
2-33 of expelled vapour 
11-26 of exjielled vapour 
7-55 of expelled vapour 
15-49 of expelled vapour 
10-8 of expelled vapour 
= 3-6 per cent. 
=3-64 per cent. 
= 3-57 per cent. 
= 3-42 per cent. 
= 3-56 per cent. 
= 3-71 per cent. 
= 0-776 per cent. 
= 3-75 per cent. 
= 2-43 per cent. 
Ihe coarse granules used in experiments 1 to 5 were formed by depositing the substance 
upon coarse copper wire-gauze, and bending the coated gauze backwards and forwards 
m CO d water, then sifting and drying the product. The metal of No. 7 had been pre- 
uously exposed for two hours in the air-bath to a uniform temperature of 152° Fahe 
and durmg that time had lost 0-05 grain in weight. 
1 of acti\e antimony rapidly deposited in a nearly pure solution of acid 
1 } roc oiate o terchloride of antimony, taken from the liquid, and discharged the 
same day m the calorimeter at 65°-5 Fahe., evolved sufficient heat to raise the tempe- 
latuie of Its own weight of ordinary antimony (specific heat =:0-0508) 624-65 Fahe. 
egi-ees. The following are the specific heat-values in water of the materials and 
apparatus : — 
Raised from 65°-5 Fahe. to 
79°-0 Fahe. =13-5 degrees. 
Antimony 356-27 grs. (sp. heat =0-06312)= 22-4877 grs. of water ) 
Brass basket (sp. heat =0-0939 )= 5-0696 grs. of water 
Immersed part of glass tube (sp. heat =0-1770 )= 28-718 grs. of water 
Mercury of thermometer ...(sp. heat =0 0330 ) = 6-832 grs. of water 
774-320 grs. 
837-4273 grs. of water 
The discharge in this instance was quite instantaneous, and shattered the bar into 
MDCCCLIX. 5 ^ 
