THE PRINCIPLES AND OBJECTS OF GEOLOGY. MINISTRY OF FINANCE, EGYPT. * * * * * SURVEY DEPARTMENT. * * * * * THE PRINCIPLES AND OBJECTS OF GEOLOGY WITH SPECIAL REFERENCE TO =THE GEOLOGY OF EGYPT,= BY W. F. HUME, D.SC., F.R.S.E., ETC. DIRECTOR, GEOLOGICAL SURVEY OF EGYPT. * * * * * _Technical Lectures delivered in the Survey Department, Giza, on January 20, and February 10, 1910._ [Decoration] CAIRO: Printed at the NATIONAL PRINTING DEPARTMENT, and to be obtained at the SALE-ROOM, Geological Museum, Ministry of Public Works Gardens; at the SURVEY DEPARTMENT, Giza (Mudiria); or through any Bookseller * * * * * 1911. =PRICE 5 P.T.= ILLUSTRATIONS. * * * * * PAGE. Fig. 1. — Two Anticlines and a Syncline 6 „ 2. — Overfolding of Strata 7 „ 3. — Unconformity exhibited in the Fayûm 8 „ 4. — Fault exhibited by a Coal-seam 8 „ 5. — Sand-erosion of Sandstone Cliff at Gebel el Tunb Facing 10 „ 6. — Water-worn Amphitheatre in Side-valley of Um Leseifa „ 10 „ 7. — Denudation Effects in a District of Sedimentary Rocks „ 11 „ 8. — Denudation Effects in a District of Igneous Rocks „ 11 * * * * * =THE PRINCIPLES AND OBJECTS OF GEOLOGY= WITH SPECIAL REFERENCE TO =THE GEOLOGY OF EGYPT.= * * * * * I.—GENERAL.