412 
FAIKLEY : BLOWING WELLS. 
A second set of readings with an out-current from July 6th, 
1879, at 10-20 p.m., to July 9th, at 10 a.m., when the current 
was nearly stopped, but not quite finished, gave initial bar, 29*8 ; 
final, 29-275; anemometer reading, 2,285,338; temperature of 
air, average 57*7 : temperature of out-current, average 55-2 ; 
calculated volume of cavity, 11 millions of cubic feet nearly. 
Table I gives another set of readings from December 4th to 
16th, 1879, in which the anemometer gave the velocity of the 
current at the times of observations. 
Working out the results from December 3rd, to December 9th, 
we obtain the following results. 
Observations with anemometer : — 
December 5th to 9th inclusive, v = velocity per minute in 
linear feet. 
December 5th, at 5-42 p.m., barometer stationery. Observed 
velocity at 10-30 a.m., December 6th, 835*4 .-. mean v. for 16 
835-4 
hours 48 minutes = = 417-7. 
2 
Total feet passed = 417-7 x 1008 = 421,041. 
December 6th, 10-30 a.m. to 5 p.m. = 6 \ hours. Mean 
835-4 + 845-8 
v. = 840-6. 
2 
Total feet passed 840-6 x 390 = 327,834. 
December 6th, 5 p.m., to 7th, 10-30 a.m., 17£ hours. Mean 
845-8 + 665-6 
v. - = 755-7. 
2 
Total feet passed 1050 x 755-7 = 793,485. 
December 7th, 10-30 a.m. to 5-30 p.m. = 6 hours. Mean 
665-6 + 486-6 
v. = 576-1. 
2 
Total feet passed 576-1 x 360 = 207,396. 
