PETROLEUM AND NATURAL GAS IN NEW YORK 443 



to establish the general order of the several strata that underlie 

 the Trenton limestone. The first gas is sometimes found in the 

 Pulaski wells only a few feet below the top of the Trenton lime- 

 stone. Beginning at 20 feet in this formation, accessions are 

 often found every 10 to 15 feet for the first 100 or 200 feet. This 

 is called the first vein. Below this depth, larger and more per- 

 sistent veins are found and they are liable to be struck through 

 much of the remaining portion of the Trenton section. This is 

 called the second vein. It is generally reported at about 1000 

 feet. 



The initial rock pressure of the Pulaski wells ranges between 

 165 and 650 pounds. But a single example has been noted in 

 which the highest figure was reached. The pressures of the sev- 

 eral wells when first completed were as follows : 170 lb., 250 lb., 

 600 lb., 400 lb., unproductive, 825 lb., 400 lb., 165 lb., 250 lb., 400 

 lb., 390 lb., 600 lb., 400 lb., 170 lb., 650 lb., 600 lb., 500 lb., 170 lb. 



No figures were obtained as to the daily gas production of a 

 new well, and no opportunities for measurement were found, but 

 a few tens of thousands of cubic feet will cover the production 

 of all except the very largest wells. 



A brief account of the Tollner wells, 20 in number, will here be 

 given. 



Well no. 1 was located on Island grove already referred to, of 

 which Mr Tollner was the owner. This well was begun on 

 July 4, 1893. The well was drilled by O'Donnell & Rick, experi- 

 enced Pennsylvania drillers, The Trenton was struck at 550 feet. 

 The largest gas vein was not reached till a depth of 1050 feet 

 had been drilled. A rock pressure of 170 pounds was observed 

 at this point. The well was not carried to a greater depth. 



Well no. 2 was located one half mile northeast of no. 1. It was 

 drilled to a depth of 1100 feet, when a pressure of 225 pounds 

 was reached. Two main veins of gas were found, one at 800 

 feet and the other at 1000 feet. Of these veins the last was 

 the stronger. The Trenton limestone at the point where the drill 

 was stopped, was black, a phase which it takes on at the typical 

 locality, Trenton Falls. 



Well no. 3 was located on North street, one half mile due 

 north of well no. 1. It proved much more productive than either 

 of its predecessors. Its first strong vein was found at 700 feet 



