INTRODUCTORY LETTER.


                 CHEMICAL LABORATORY OF THE
              KENTUCKY STATE GEOLOGICAL SURVEY,
                           LEXINGTON, February, 1877.
Professor N. S. SHALER, Chief Geologist, &c..
  DEAR SIR: I have the pleasure to report the results of the
chemical work performed by myself and Mr. Talbutt, for the
State Geological Survey, during the past year, or since the
preparation of the last report nearly up to the present date.
                           Very respectfully,
                                  ROBERT PETER.
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