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county reports, prepared during the Swallow survey.^[1] The second volume was a large octavo of 655 pages^[2] transmitted in April, 1873. Part I consists, first, of a chapter on the geology of Pilot Knob and vicinity by Mr. Pumpelly; the second chapter embodies analyses of ores, fuels and pig irons; chapters III to IV, inclusive, constitute a partial report on the iron ores of Missouri by Dr. Adolph Schmidt. Part II consists of fifteen chapters and three appendices; of these, chapters I to VI contain general information relating to the coal fields of the state by Prof. G. C. Broadhead; chapters VII to VIII are on the geology of Lincoln county by Prof. W. B. Potter; chapters IX to XV consist of reports on seven counties by G. C. Broadhead; appendices A, B and C relate to building stones and contain a list of Coal Measure fossils.

After Mr. Pumpelly's resignation, Prof. G. C. Broadhead was appointed state geologist and assumed charge in July, 1873. During this administration the examinations of the iron ores and of the lead and zinc deposits were continued, and surveys for a number of county reports were made. One volume was issued by the Broadhead survey.^[3] This is a large octavo of over 790 pages transmitted in August, 1874. Chapters I to VI, inclusive, are upon general topics relating to the history of exploration and the general geology of the state by Professor Broadhead; chapters VI to XXI, inclusive, consist of reports on fifteen counties; chapters XXII to XXXII, inclusive, and XXXIV, describe the lead and zinc deposits of the state from work done by Dr. Schmidt and Mr. A. Leonhard; chapters XXXIII and XXXV relate to the iron ores of southeastern