LETTER OE TRANSMITTAL 
Department of the Interior, 
United States Geological Survey, 
Washington, D. C, April c 21, 1903. 
Sir: 1 have the honor to transmit herewith, in form for publication, 
certain geographic tables and formulas pertaining- to the work of the 
topographic branch of this Survey. The endeavor has been to bring 
together all tables and formulas used by the topographer in the field 
and office, and it is believed that their publication will be useful, not 
only to the topographic corps, but to others engaged in similar lines 
of work. The material has been drawn from various sources, some 
of it having been prepared from time to time by various members of 
the Geological Survey and the remaining portions having been taken 
principally from publications of the U. S. Coast and Geodetic Survey 
and the Smithsonian Institution. 
The compiling was done by Mr. S. S. Gannett, and the material was 
revised by Mr. E. M. Douglas and Mr. H. L. Baldwin, jr. 
Very respectful 1 v , 
R. U. Goode, 
Chairman Topographic Committee. 
Hon. Charles D. Walcott, 
Director United States Geological Survey. 
