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. THE SAME FOR 1909. 11 pp. Price, 50 milliemes. STANDARDIZATION OF THE MAGNETIC INSTRUMENTS AT HELWAN OBSERVATORY DURING 1907, by H. E. HURST. (Survey Department Paper, No. 8). 1908. 45 pp., 4 illustrations. Price, 100 milliemes. =Miscellaneous.= ANNUAL REPORTS ON THE WORK OF THE SURVEY DEPARTMENT, by the Director-General, as follows: 1905, 120 milliemes; 1906, 1907, 1908 and 1909, 100 milliemes each. CHEMISTRY OF THE RIVER NILE, by A. LUCAS, 1908. (Survey Department Paper, No. 7). 78 pp., 1 map, 1 illustration. Price, 150 milliemes. COLLECTION OF STATISTICS OF THE AREAS PLANTED IN COTTON IN 1909, by E. M. DOWSON and J. I. CRAIG. 1909. English or Arabic. 77 pp., 8 illustrations. Price, 150 milliemes each. COLLECTION OF STATISTICS OF THE AREAS PLANTED IN COTTON IN 1910. 1910. English or Arabic. Price, 50 milliemes each. PRESERVATIVE MATERIALS USED BY THE ANCIENT EGYPTIANS IN EMBALMING, by A. LUCAS, F.I.C. (Survey Department Paper, No. 12). 1911. 59 pp. Price, 100 milliemes. * * * * * [Footnote: £ 1 = 975 milliemes; $ 1 = 200 milliemes; Mk. 1 = 48 milliemes; Fr. 1 = 38 milliemes.] * * * * * Imp. Nat. 4323-1910-250 br. * * * * *