RECORD OF DEEP-WELL DRILLING FOR 1905. 
By Myron L. Fuller and Samuel Sanford. 
PROGRESS IN THE COLLECTION OF WELL RECORDS 
AND SAMPLES, 1905. 
By Myron L. Fuller. 
The present is the second of the series of reports on the collection 
of deep-well samples, the first of which, covering the period from 
the beginning of the work July 1, 1904, to December 31, 1904, was 
published as Bulletin No. 264. This report presents the records 
of a large number of wells from which more or less complete sets 
of samples have been secured and placed on file at the Survey, and 
also many additional records not represented by samples. 
The work has been conducted by the eastern section, division of 
hydrology, the expense being shared with the western section of 
hydrology and the geologic branch. The writer has continued in 
charge of the investigations and has been assisted by Messrs. E. F. 
Lines and Samuel Sanford. The burden of executive details has 
fallen mainly on Mr. Sanford since his assignment to the work on 
its relinquishment by Mr. Lines April 1. The methods followed 
are in most particulars those formulated by Mr. A. C. Veatch on 
the inauguration of the work in 1904, but to Mr. Sanford is due the 
credit for materially increasing the usefulness of the work to the 
driller, especially in furnishing geologic information. 
OBJECTS OF THE WORK. 
GENERAL STATEMENT. 
The chief objects of the collection of well samples and the publi- 
cation of records were: (1) To encourage drilling by pointing out 
to prospective well owners the probabilities of success, (2) to assist 
drillers by helping them to a better understanding of the rock 
succession and by interpreting for them their samples and records, 
and (3) to furnish to geologists accurate stratigraphic data from 
which a more intimate economic or scientific knowledge of the 
geologic conditions could be derived. 
