222 Royal Society : — 



Bismuth (pure, cast) + 24*96 



Bismuth (crystal, axial) + 24-59 



Bismuth (crystal, equatorial) + 17"17 



Cobalt No. 1 (a pressed specimen prepared by Professor 

 Duflos, aud from the Collection of the Heidelberg 



Chemical Laboratory) +8-977 



Potassium (the same as used for the determination of its 



electric conducting powers for different temperatures) -f 5-492 



Argentine (wire of commerce, hard) +5-240 



Nickel (commercial, free from cobalt, but containing 



iron, &c.) +5-020 



Cohalt No. 2 (from the Collection of the Heidelberg 



Chemical Laboratory) + 3-748 



Palladium (wire, hard, from Desmoutis, Chapuis and Co. 



of Paris) .• +3-560 



Sodium (the same as used for the determination of its 



electric conducting powers for different temperatures) +3-094 



Quicksilver (pure, fused in a glass tuhe) +2-524 



Aluminium (from Rousseau freres of Paris, wire-drawn, 

 analysed by Dr. G. C. Caldwell, and found to contain 



Si 2-34, Fe 5-89, and Al 91-77) +1-283 



Magnesium (wire, pressed) +1-175 



Lead (pure, pressed wire) +1 "029 



Tin (pure, pressed wire) + 1-000 



Copper No. 1 (wire of commerce annealed, containing 



appreciable quantities of zinc, tin, lead and nickel) . , +1-000 



Copper No. 2 (wire of commerce annealed) +0-922 



Platinum (wire from Desmoutis, Chapuis and Co. of Paris) +0-723 



Gold (wire, hard drawn, purified by Dr. C. Meyboom) . . +0-613 

 Iridium (from the Collection of the Heidelberg Chemical 



Laboratory) +0-163 



Antimony (wire, pressed specimens, purified by Dr. W. P. 



Dexter and Dr. G. C. Caldwell) +0-036 



Silver (pure, drawn, hard) O-QOO 



Gas-coke (from the Heidelberg Gas- Manufactory, the hard 



mass remaining in the retorts) —0*057 



Zinc (pure, pressed) —0-208 



Copper (galvanoplastically precipitated) —0-244 



Cadmium (a strip of foil from Prof. Bottger) —0-332 



Antimony (commercial, pressed wire) — 1-897 



Strontium (pressed wire) -2-028 



Lithium (pressed wire) -3-768 



Arsenic (a piece, pure) —3-828 



Calcium (pressed wire) —4-260 



Iron (pianoforte wire No. 4) -5-218 



Antimony (axial) — 6-965 



Antimony (equatorial) '. — 9-435 



Red phosphorus (from Prof. Schrotter, from the Collec- 

 tion of the Heidelberg Chemical Laboratory) —9-600 



Antimony (purified as above) —9-871 



I 



