1876.] »>5J [Lesley. 



torpedoing it commenced to pump at the rate of 15 barrels per day, and 

 increased gradually, and on 

 March 1st, it was pumping 30 barrels per day. 



" 20th, " " 34 



April 1st, " " 28 " 



" 8th. '• " 30 " " 



May 10th, " " 20 " " 



Colorado Well, No. 20. 



April 11th, 1876. 



Level of well mouth above ocean 



Drive pipe to rock 41 feet. 41 = 



Interval, containing 1st and 2d S. S 455 to 496 = 



3dS. S 44 " 540 ^ 



? pocket. 10 " 550 = 



Drilled dry. Cased at 159 feet. 



Softest part of 3d S. S. from 5 to 18 feet below the top. Oil began to come 

 in with a very little salt water while drilling between 5 and 8 feet. Quite 

 an increase of salt water at 24 feet. Gradual increase of gas all the way 

 from 5 to 25 feet. Sand very hard at 39 feet, but good at the bottom of the 

 rock. 



Natural production 2^ barrels of oil, with about 8 barrels of salt water 

 per day. 



April 21st, 1876, torpedoed (3 pints) 8^ feet below top of 3d S. S. Pro- 

 duction during the first twenty-four hours thereafter, 7 barrels of oil with 

 not much increase of salt water and a small increase of gas. 



May 10th, 1876, pumping 6 barrels of oil per day. 



Colorado Well, No. 21. 

 June 7th, 1876. 



Level of well mouth above ocean 



"Wooden conductor to rock. . , 10 feet. 10 ■== 



Stove pipe casing* 14 " 14 = 



Interval, containing 1st and 2d S. S 614 " 628 = 



3dS. S 41 " 669 = 



? pocket. 10 " 679 = 



Drilled dry. Cased at 249 feet. 



The softest and best part of the 3d S. S. commenced at 2 feet below its 



* Sometimes the conductor is not properly driven to the rock. The drilling 

 commences, and after going down some distance it is discovered that the loose 

 naaterial is falling in at its bottom. When the "cave" is not very serious a 

 common, riveted, sheet iron " stove pipe"' cylinder is shoved down to prevent 

 its enlargement. This casing is merely a supplement or lining to the conductor, 

 and represents what should have been the length of the conductor had it prop- 

 erly been put In originally. 



