Vol. X, No. 6.] An Improved Method of using Oil Gas. 21!> 



[JV s.i 



were delivered from a graduated gas-holder of two litres capacity, 

 to which was attached a barometer and regulating valve 

 capable of fine adjustment for the admission of water. 



The areas of cross section of the combustion tubes were 

 measured by means of a Vernier Microscope. A capillary tube 



wide 



tube 



and the gas holder was found to be an efficient safeguard for 

 the prevention of explosion in the experimental gas-holder. 



The stream of gas was so adjusted that the flame was just 

 prevented from travelling against the current and remained 

 steady at the particular point in the tube at which the area of 

 cross section was afterwards measured. 



In the following tables V — reading of the water level in the 

 gas-holder in cubic centimetres. (After correcting the gradua- 

 tions of the gas-holder for the volume occupied by the tube 

 delivering the water each u 100 cc." = 98*7 cc). 



T = time in | seconds. 



R = Rate of the stream of gas in the combustion tube when 



equilibrium is established. 



a = area of cross section of the combustion tube. 



Experiment I. 



Volume per cent of oil gas in mixture = 5*78 



a =00945 sq. cm. 



V 1100 1200 1300 1400 1500 

 T 790 1030 1266 1504 1745 

 T per " 100 cc." 240 236 238 241 



Average time for 98-7 cc. = 47*8 sees. 



Hence R = 21 - 5 cm. per sec. 



Experiment II. 



Volume per cent of oil gas in mixture = 7'14. 



a =00935 sq. cm. 



V 1400 1500 1600 1700 

 T 207 411 610 

 Tper"100cc." 207 204 199 



Average time per 98*7 cc. = 40*6 sees. 



Hence R = 260 



Experiment III. 



Volume per cent of oil gas in mixture = 7*53. 



a = 00935 sq. cm. 



V 700 800 900 1000 1100 1200 

 T 186 371 559 — 926 

 Tper " 100 cc." 186 185 188 184 



Average time per 987 cc. = 37 sees. 



Hence R = 28*5 cm. per sec. 



