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Professor, geologist, in Huntingdon county; address Morgantown, W. V.

Mr., geologist, in Centre county; 711 Walnut street, Philadelphia.

Mr., geologist, in Cumberland and York counties; 711 Walnut street, Philadelphia.

Dr., geologist, in Clearfield county; 2423 Fairmount Avenue, Philadelphia.

Professor, geologist, in Perry and Juniata counties; address in future, Akron, O.

Mr., M. E., Monongahela city, Pa.

Mr., chemist; 223 Market street, Harrisburg.

Mr., fossil botanist; Columbus, Ohio.

Mr., topographer, in charge of illustrations for reports, and general correspondence at head-quarters; 905 Walnut street, Philadelphia.

Mr., geologist, in charge of the Survey of the Anthracite coal fields; headquarters, address 907 Walnut street, Philadelphia.

Mr., assistant and secretary, Philadelphia office.

Mr., topographer and artist, Philadelphia office.

Mr., assistant geologist, in the Northern Coal Field; Scranton, Pa.

Mr., topographer, in the Northern Coal Field; Scranton, Pa.

Mr., assistant, in the Northern Coal Field; Scranton, Pa.

Mr., aid, in the Northern Coal Field; Scranton Pa.

Mr., assistant geologist, in the Eastern Middle Coal Field; Philadelphia office.

Mr., assistant, in the Eastern Middle Coal Field; Pittston, Pa.

Mr., assistant geologist, in the Western Middle Coal Field; Pottsville, Pa.

Mr., assistant, in the Western Middle Coal Field; Pottsville, Pa.

Mr., aid, in Western Middle Coal Field; Pottsville, Pa.