The insertion of meridian lines and parallels of latitude at every ten degrees, and the substitution of names for reference numbers, will add to the usefulness of the map. With respect to the text, a large proportion of the objects in the Catalogue and in the Appendix have been observed and drawn by the author many times during the last thirty years, and described in _The Observatory_ and other publications. He has had, besides, the advantage of consulting excellent sketches by Mr W.H. MAW, F.R.A.S., Dr. SHELDON, F.R.A.S., Mr. A. MEE, F.R.A.S., Mr. G.P. HALLOWES, F.R.A.S., Dr. SMART, F.R.A.S., Mr. T. GORDON, F.R.A.S., Mr. G.T. DAVIS, Herr BRENNER, Herr KRIEGER, Mr. H. CORDER, and other members of the British Astronomical Association. Through the courtesy of Professor HOLDEN, Director of the Lick Observatory, and M. PRINZ, of the Royal Observatory of Brussels, many beautiful photographs and direct photographic enlargements have been available, as have also the exquisite heliogravures received by the author from Dr. L. WEINEK, Director of the Imperial Observatory of Prague, and the admirable examples of the photographic work of MM. PAUL and PROSPER HENRY of the Paris Observatory, which are occasionally published in _Knowledge_. The numerous representations of lunar objects which have appeared from time to time in that storehouse of astronomical information, _The English Mechanic_, and the invaluable notes in "Celestial Objects for Common Telescopes," and in various periodicals, by the late REV. PREBENDARY WEBB, to whom Selenography and Astronomy generally owe so much, have also been consulted. As a rule, all the more prominent and important features are described, though very frequently interesting details are referred to which, from their minuteness, could not be shown in the map. The measurements (given in round numbers) are derived in most instances from NEISON'S (Nevill) "Moon," though occasionally those in the introduction to Schmidt's chart are adopted. THOMAS GYWN ELGER. BEDFORD, 1895. CONTENTS INTRODUCTION MARIA, OR PLAINS, TERMED "SEAS" RIDGES RING-MOUNTAINS, CRATERS, &C. Walled Plains Mountain Rings Ring-Plains Craters Crater Cones Craterlets, Crater Pits MOUNTAIN RANGES, ISOLATED MOUNTAINS, &c. CLEFTS, OR RILLS FAULTS VALLEYS BRIGHT RAY-SYSTEMS THE MOON'S ALBEDO, SURFACE BRIGHTNESS, &c. TEMPERATURE OF THE MOON'S SURFACE LUNAR OBSERVATION PROGRESS OF SELENOGRAPHY, LUNAR PHOTOGRAPHY