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

by W. F. Hume

Errors of Observation, by T. L. Bennett. (Technical Lecture). 1908. 27 pp., 3 illustrations. Price, 50 milliemes.

Longitude—Determination of, by E. B. H. Wade. (Technical Lecture) 1908. 39 pp., 2 maps, 1 illustration. Price, 50 milliemes.

Longitudes—A Field Method of Determining—by Observations of the Moon, by E. B. H. Wade. (Survey Department Paper, No. 5). 1907. 47 pp., 9 illustrations. Price, 100 milliemes.

Map-Projections, by J. I. Craig. (Technical Lecture). 1909. 25 pp., 1 map, 25 illustrations. Price, 50 milliemes.

Map-Projections—The Theory of—with special reference to the Projections used in the Survey Department, by J. I. Craig. F.R.S.E., (Survey Department Paper, No. 13). 1910. 77 pp., illustrated. Price, 200 milliemes.

Relief on Maps—The Representation of, by Capt. H. G. Lyons. (Technical Lecture). 1909. 19 pp., 5 maps. Price, 50 milliemes.

Terrestrial Magnetism.

Magnetic Observations in Egypt, 1895-1905, with a summary of Previous Magnetic Work in Northern Africa, by B. F. E. Keeling. (Survey Department Paper, No. 6). 1907. 65 pp., 4 maps. Price, 100 milliemes.

Magnetic Observations made from April to December, 1907, at Helwan Observatory. 8 pp. Price, 25 milliemes.

Magnetic Observations made during 1908 at Helwan Observatory. 11 pp. Price, 25 milliemes.