316 



BRIDG^IAN. 



temperature near 60° for all pressures above 2000 kg., and at 8000, 

 10000, and 12000 there are in addition minima near 30°. 



Silver. The same wire was used as that on which the resistance 

 measurements were made. The silk insulation was removed to pre- 

 vent viscous drag by the transmitting fluid, and measurements were 



30 



40^ 50' 60" 70^ 



Temperature 



Silver 



80" 90" 



100° 



Figure 17. Silver. Thermal E.M.F. of a couple composed of one branch of 

 imcompressed metal, the other compressed to the pressure indicated on the 

 cuTA-es, the junctions being at 0°C and the temperature plotted as abscissae. 



made on five strands in parallel. The use of strands in parallel 

 has several advantages; it reduces viscous drag, reduces danger'of 

 breakage during handling (the wire was 0.003 inch in diameter), and 

 reduces the resistance of the circuit so that the galvanometer is more 

 sensitive. 



