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of mercury, as they had observed that whilst the crystallised 
amalgams of silver and tin conducted heat badly, that of zinc, 
which was perfectly fluid and free from crystals, conducted 
heat very freely. As they pursued their researches they 
found these views to be incorrect, for the amalgam of bismuth, 
a very crystalline one, conducted heat with great facility. 
Having observed that tin affected the fluidity of mercury 
in a most remarkable manner, so that even the one hundred 
thousandth part of that metal would interfere with the pro- 
perty which mercury has of assuming easily a globular form, 
they prepared the following series of amalgams of tin. 
Silver=1000 
Found. Calculated. Found. Calculated. 
Mercury 94-50+Tin 5*50 ... 4-00 ... 2M4 ... 125 ... 663 
„ 97-00+ „ 3-00... 4-60 ... 21-35 ... 144 ... 669 
„ 98-00+ „ 2-00 ... 5-65 ... 21-43 ... 177 ...672 
„ 98-25+ „ 1-75 ... 5-90 ... 21-45 ... 185 ... 673 
„ 98-50+ „ 1-50 ... 10-95 ... 21-47 ... 343 ... 673 
„ 99-00+ „ 1-00 ... 19-30 ... 21-52 ... 605 ... 675 
„ 99-50+ „ 0-50 ... 19-30 ... 2+56 ... 605 ... 675 
This table proves that up to 1*75 the conductibility of 
mercury remains constant, when by reducing the tin by±ioth 
the conductibility of the amalgam is doubled ; by further 
abstracting one-third of the tin, the conductibility is again 
doubled. 
