THOMPSON. — ON THE EQUILIBRIUM OF THE SYSTEM. 447 



Experiment 7. 



The charge consisted of powdered carbide with some coarser pieces 

 on top. It was heated in the furnace at 1050° for an hour and a 

 quarter and evacuated to 0.1 centimeter. Hydrogen was then let in 

 to a pressure of 1.6 centimeters, the furnace was evacuated to 0.10 and 

 carbon monoxide let in to 0.25 centimeter. Finally hydrogen was let 

 in to 68.3 centimeters requiring one hour and a half with 14 amperes. 



Duration of run: 6 hours 

 Power: 11.8 K. W. 

 Temperature: 1475° 



The cuprous chloride bulbs were refilled, but not the gold chloride. 



Initial weight cuprous chloride bulbs 173.7646 grams 



Final " " " " 173.7695 " 



Gain 0.0049 " 



Initial weight gold chloride bulb 116.8121 grams 



Final " " " " 116.8126 " 



Gain 0.0005 " 



Total gain 0.0054 " 

 Time required for absorption, 3 hours. 



0.00065 X 0.0821 X 291 X 760 X 95 



.'. pec = = 0.81 mm. 



FLO 19.9 X 69.3 



Experiment 8. 



The charge was the same material as used in Experiment 7. 



The furnace was evacuated and heated for an hour and fifty minutes 

 at 1050°. It was then evacuated to a pressure of 0.12 centimeter and 

 hydrogen let in to 2.0, again evacuated to 0.15 and carbon monoxide 

 let in to 0.28 centimeter. Hydrogen was then admitted to 77.6 centi- 

 meters requiring an hour and a quarter. 



Duration of run : 6 hours, 10 minutes. 

 Power: 11.4 K. W. 

 Temperature: 1445° C. 

 The cuprous chloride bulbs were refilled. 

 Initial weight of cuprous chloride bulbs 167.4274 grams 

 Final " " " " " 167.4312 " 



0.0038 " 



