It should not be forgotten in addition that as a branch of the War Office and the Publishing Department of the Intelligence Branch, military supervision is essential. Its offices are therefore not open for public inspection except on proper introduction. The author had the rare privilege of spending three months at the Southampton office in 1888, through the introduction of the director of the Geological Survey, and the request of our recent minister in London, Mr. Phelps. Nothing could have exceeded the courtesy and hospitality of the director of the survey, Sir Charles W. Wilson, and the officers in charge of the various departments, not alone in granting the necessary authority to inspect every branch of the work, but in lending personal aid and men for that purpose. Great interest was also expressed in the topographic surveys of this country which differ so essentially from the Ordnance Survey. In the former, field work and methods are directly adapted to the scale of publication; in the latter, the largest scale of publication governs the operations of the survey, and the smaller scales are reduced by photography, with a gradual elimination of unnecessary details from the larger to the smaller scales until finally the topographic map of the country, on the scale of one mile to one inch is produced, which possesses an accuracy and character that could be obtained by no other method. To illustrate this important subject there are exhibited a series of experimental and complete maps and diagrams which will well repay careful examination. They were prepared and collected at the Ordnance Survey at Southampton expressly for this purpose and with the kind permission of the present director, Colonel Sir Charles W. Wilson, R. E., C. B. * * * * * The author desires to state that many of the paragraphs of the paper, particularly those relating to the history of the Ordnance Survey, have been extracted from the following works and reports on the subject: 1. The Ordnance Survey of the United Kingdom, by Lieut.-Col. P. Pinkerton White, R. E. 2. The Ordnance Survey of the Kingdom, by Capt. H. S. Palmer, R. E. 3. Methods and processes adopted for the production of the maps of the Ordnance Survey, by Lieut.-Genl. Sir Henry James, R. E., F. R. S. 4. Reports of Col. Colby and others in the Blue Books presented to Parliament--1850-1860. GEOGRAPHIC NOMENCLATURE. REMARKS BY HERBERT G. OGDEN, GUSTAVE HERRLE, MARCUS BAKER, AND A. H. THOMPSON. MR. OGDEN: It was expected that Professor Mendenhall would be with us this evening to address the society on the subject of Geographic Nomenclature but he is unavoidably absent, having been called to Philadelphia, and has requested me to represent him, and present to you an apology for his absence.