30 RECORD OF DEEP WELL DRILLING FOR 1904. [bull. 264. 
ARRANGEMENTS FOR COOPERATION. 
When the addresses are first recorded on the cards, a letter inviting 
cooperation is sent. The character of the letter varies with the person 
to whom it is addressed, but one or the other of two forms is commonly 
used. These are given below, the first being sent to drillers and the 
second to well owners. 
Letter sent to drillers. 
Sir: The demand for information regarding wells has become so great that the 
United States Geological Survey has decided to issue a yearly publication giving 
briefly an account of the wells bored in the preceding year. This report is to be 
published as near the beginning of each year as practicable, and will be sent to all 
who apply for it. It will contain the names and addresses of persons doing well 
work, and will summarize the work done by them in the preceding year. 
In order that no portion of your work may be overlooked in this report, you are 
requested to inform this office from time to time of the progress of your work and to 
forward records and samples of the materials penetrated in your wells. 
That the foreman of the outfit, or the person visiting the wells, may not be bur- 
dened with a great number of bulky bottles or cans and an ever-growing accumula- 
tion of samples, small canvas bags have been prepared (one of which is inclosed) in 
which samples may be transmitted through the mails without the payment of post- 
age. As these samples can be mailed as often as the men visit the post-office, there 
is no danger that they will accumulate and become burdensome. For the keeping 
of a log a convenient pocket memorandum book has been prepared and will be sent 
with the sample bags. 
In order to keep in touch with you and your foreman, a card like the inclosed will 
be mailed at stated intervals. This will not only serve as a reminder, but will save 
you some clerical labor. 
This work should enlist your cooperation for the following reasons: 
First. Your name and work will be kept before a class of readers interested in well 
drilling. 
Second. Records of your work will be carefully tiled in this office, and will be 
readily available to you at any time, so that in case your notes are lost they can be 
duplicated. 
Third. You will aid materially in the study of the geological structure of the 
United States, a knowledge of which can not fail to benefit you as a well driller. 
In some cases it will be necessary that the records should be regarded as confiden- 
tial, and in these cases the information will be carefully guarded, and used only 
under the conditions which you stipulate. 
I shall be glad to hear from you regarding this work and will be grateful to you 
for any suggestions. 
Letter sent to well owners. 
Sir: The Survey is making a systematic collection of well records and samples. 
Such data are of great assistance in the study of many of the problems which the Sur- 
vey is called upon to investigate, and you are cordially invited to render assistance 
by sending to this office records and samples from the wells in which you are 
interested. 
The results of this work, except in cases of confidential records, will appear in a 
yearly publication and in detailed reports of special areas, which will be prepared 
from time to time, copies of which w T ill be sent to you. 
If you will undertake to save samples, please sign and return the inclosed card, 
which requires no postage. A supply of canvas bags like the one inclosed will then j 
