G. Illustrations.

Classification of Clouds for the Weather Observers of the Hydrographic Office. Hydrographic Office, Bureau of Navigation, Department of the Navy, Washington, D. C. 1897. Sheet of twelve colored views. Price 40 cents. In book form, with descriptive text, $1.00.

An excellent set of cloud views, classified according to the International Nomenclature. The text describes the various cloud forms and shows their value as weather prognostics. An attractive addition to the furnishings of a schoolroom.

Selected List of Cloud Photographs and Lantern Slides.

Consists of twenty-eight photographs, and the same number of lantern slides, of the typical cloud forms, selected by the present writer from the collection in the Physical Geography Laboratory of Harvard University. The photographs (20 cents each, mounted) and slides (40 cents each) may be purchased of E. E. Howell, 612 17th Street, N. W., Washington, D. C. A description of these views was published in the American Meteorological Journal for July, 1894 (Boston, Mass., Ginn & Company).

Photographs. Photographs of miscellaneous meteorological phenomena, such as snow and ice storms, damage by storm-waves or high winds, wind-blown trees, lightning, etc., may often be purchased of local dealers. They add to the attractiveness of a schoolroom and furnish excellent illustrations in teaching.

H. General.

The following Bulletins of the Weather Bureau may be found useful as reference books:

No. 1. Notes on the Climate and Meteorology of Death Valley, California. Mark W. Harrington. 8vo. 1892. Pp. 50.

No. 8. Report on the Climatology of the Cotton Plant. P. H. Mell. 8vo. 1893. Pp. 68.