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broken, and cut by intrusive porphyries, basalts, granites, and other eruptives.

These conditions of structure prevent any other than a general unfavorable report on the district, although in certain localities conditions may, and probably do, exist favorable to the securing of artesian water.

ACKNOWLEDGMENTS.

It gives me great pleasure to be able to publicly acknowledge the kind assistance rendered the Survey by the press of the State in the notices printed of our First Annual Report and the publication of many extracts from it, as well as the special articles furnished them by this office, whereby many items of interest and value have been disseminated among the people more thoroughly than could have been done by means of the regular report.

The assistance rendered the geologists and their parties during their field work by the citizens of the various sections visited has been of greatest service, not only by the actual aid given, which was very great, but still more by the fact thereby evinced of their interest in and appreciation of our work.

The co-operation of the United States Geological Survey, the United States Coast and Geodetic Survey, and of Professors Heilprin, Hyatt, Cope, and Dr. Roemer have already been mentioned, and our thanks are due for it.

To those who have worked with me on the Survey and have given, each in his own field, their best efforts; who have cheerfully carried out the general plans of work as outlined by me; who with conscientious and continued labor, sometimes through hardships, and even at the sacrifice of personal advantages, have by their work brought out the great scientific and economic facts concerning the resources of Texas which appear in part in these reports, and which will mark an important era in the material advancement of the State; who have at all times shown me all courtesy—to all of these I express my deep appreciation of their kindness and return my most sincere thanks.