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As an index of the amount of work involved in correspondence alone, the number of letters received during the year was more than two thousand, and a still larger number were written.

PUBLICATIONS.

The publications of the year 1891 by the Survey are as follows:

• I. Second Annual Report of the Geological Survey of Texas. 8vo. pp. cx., 738; pl. xxviii.
  Of this Report the following parts were issued as separates:
  • Report of the State Geologist.
  • Reports on the Iron Ore District of East Texas.
  • Report on the Geology of Northwest Texas.
  • Report on the Geology and Mineral Resources of the Central Mineral Region of Texas.
  • Report on the Geology and Mineral Resources of Trans-Pecos Texas.
  • Carboniferous Cephalopoda.
• II. Preliminary Report on the Utilization of Lignites.

Of the total number of each publication the law requires that a certain number be retained by the Secretary of State, and the remainder are turned over to this department for distribution. After reserving a small number for future needs and the required number for our exchange list, the balance are distributed to all citizens of the State who wish them, on payment of postage or express charges.

ACKNOWLEDGMENTS.

Our field parties have met with ready assistance and help from the citizens of the various portions of the State in which the work has been carried on. The number of persons who have thus aided us, and to whom our thanks are due, is so great that I can only acknowledge our obligations to them collectively, and trust that sooner or later they may be more fully repaid by the results springing from our labors.

To the United States Geological Survey we are under renewed obligations for a more extended co-operation even than that of previous years. To the United States Coast and Geodetic Survey our thanks are also due for their continued assistance, as they are also to the many Paleontologists who have aided us as I have already described.

To the members of the Survey, one and all, who have given such faithful work toward the carrying out of the plans outlined for them, I return my most sincere thanks.