22 



ROYAL SOCIETY OF CANADA 



the correct reading was 9-27. Thus bath readimgs are practically 

 identical, and the increased stress produced by the manner of loading 

 appears to have no influence on the deflection of the galvanometer. 



TABLE VIII. 



Resistance of thermo-pile — 555 ohms. 

 Resistance of galvanometer = 5 ohms. 

 Resistance of leads = 052 ohms. 

 Scale of distance = 5'.:10". 

 One division on scale = 05. 



The readings obtained are plotted in Figure 8, and show no trace 

 of the vibration stress. 



The same bar was loaded from 500-16,000 pounds (a) gradually, 

 (b) in 4 seconds; the corrected readings were 18*25 and 18*4 respec- 

 tively, and the plotted curves were perfectly regular as before. 



