Gold (wire, hard drawn, purified by Dr. C. Meyboom) .. -f 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) + 0*000 



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 



An alloy of 12 parts of bismuth and 1 part of tin 13*670 



An alloy of 2 parts of antimony and 1 part of zinc .... 22700 

 Tellurium (from M. Alexander Loewe, purified by 



M. Holtzmann) - 179*80 



Selenium (from the Collection of the Heidelberg Chemical 



Laboratory) ... 290*00 



The method by which these determinations were made is the 

 following : Two thermo-elements, whose warm and cold soldering 

 points had the same temperatures, were compared with each other ; 

 these formed a circuit with the coil of a multiplicator, which sur- 

 rounded a magnet rod (of about a pound weight) to which was fast- 

 ened a piece of looking-glass, thereby allowing the deflections of the 

 magnet to be observed at a distance by means of a telescope and 

 scale, in the same manner as observations are made with the mag- 

 netometer. Two commutators were also brought into the circuit ; the 

 one changed the direction of the current, in the wire of the multipli- 



H2 



