144 



Presents. 



[Jan. 13, 



16 ft. only could pass. In the Bitter Lakes the depth was seldom below 

 28 ft., often above 30 ft. ; and the same may be said of the canal between 

 the Bitter Lakes and the Red Sea at Suez. On each side of the deep 

 part in the centre the depth was generally about 12 or 13 ft. 



Where the slopes are unprotected by stone, and the natural soil is 

 sandy, the sides, notwithstanding the flat slope, were a good deal washed 

 when a paddle-wheel steamer (the 'Delta,' P. & O. 1600 tons) advanced 

 at seven or eight miles an hour ; but comparatively little effect was pro- 

 duced when the speed did not exceed five or six miles an hour. 



Two large vessels will find it difficult to pass each other ; bat " lie-by " 

 or passing-places are being constructed to remedy this inconvenience. 



J. F. B. 



January 13,, 1870. 



WARREN DE LA RUE, Vice-President, in the Chair. 



The Presents received were laid on the Table, and thanks ordered for 

 them, as follows : — 



Transactions. 



Basel: — Naturforschende Gesellschaft. Yerhandlungen. TheilT. Heft 2. 

 8vo. Basel 1809. The Society. 



Bern : — Xaturforschende Gesellschaft. Mittheilungen, ausdemJahre 1868. 

 No. 654-6S3. 8vo. Bern 1869. The Society. 



Brussels: — Academie Royale de Medecine. Memoires. TomeY. Fasc.l. 

 4to. Bnuvelles 1S69. Bulletin. 3 e serie, Tome II. No. 10; Tome III. 

 Nob. 5-10. 8vo. BruxeUes 1868-69. The Academy. 



Buenos Aires : — Museo Publico. Anales, por German Burmeister. En- 

 trega 6. 4to. Buenos Aires 1869. The Museum 



Einsiedeln : — Schweizerische Xaturforschende Gesellschaft. Yerhand- 

 lungen. Jahresbericht 1868. 8vo. Einsiedeln. The Society. 



Geneva : — Societe de Physique et d'Histoire Naturelle. Memoires. Tome 

 XX. Partiel. 4to. Geneve 1%$$. The Society. 



Gottingen: — Konigl. Sternwarte. Astronomische Mittheilungen. Theill. 

 4to, Gottingen 1869. The Royal Society of Gottingen. 



Graz : — Xaturwissenschaftlichcr Verein fur Steiermark. Mittheilungen. 

 Band II. Heft 1. 8vo. Graz 1869. The Society. 



Haarlem : — Musee Teyler. Archives. Vol. II. Ease. 3. roy. 8vo. Haarlem 

 1869. The Museum. 



London : — Quekett Microscopical Club. Journal. Nos. 7-9. Fourth Re- 

 port. 8vo. London 1869-70. The Club. 



Utrecht : — Provinciaal Utrechtsch Genootschap van Kunsten en Weten- 

 schappen. Natuurkundige Yerhandelingen. Nieuwe Reeks. Deell. 



