The principles and objects of geology, with special reference to the geology of Egypt

by W. F. Hume

In 1909, by J. I. Craig. (Survey Department Paper, No. 17). 55 pp., 1 map, 8 illustrations. Price, 100 milliemes.

Special Papers on Meteorology.

Atmospheric Electricity—Discussion of the Observations on—at Helwan Observatory, from March 1906 to February 1908, by H. E. Hurst. (Survey Department Paper, No. 10). 65 pp., 2 maps, 8 illustrations. Price, 100 milliemes.

Climate of Abbassia, near Cairo, by B. F. E. Keeling. (Survey Department Paper, No. 3). 1907. 61 pp., 1 map, 7 illustrations. Price, 100 milliemes.

Evaporation in Egypt and the Sudan, by B. F. E. Keeling. (Survey Department Paper, No. 15). 1909. 29 pp., 1 illustration. Price, 100 milliemes.

Platinum-Resistance Thermometers—Report on the use of—in determining the temperature of the air at the Helwan Observatory, by E. B. H. Wade. 1905. 20 pp., 5 illustrations. Price, 50 milliemes.

Surveying.

Altitudes—The Determination of—by Levelling, by E. M. Dowson. (Technical Lecture). 1908. 23 pp., 6 illustrations. Price, 50 milliemes.

Cadastral Survey of Egypt, 1892-1907, by Capt. H. G. Lyons. 1908. 421 pp., 30 maps, 16 illustrations. Price, 400 milliemes.

Cadastral Survey of Egypt—Comparison of—with those of some European Countries, by Capt. H. G. Lyons. (Technical Lecture). 1909. 24 pp., 8 maps. Price, 50 milliemes.