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

CATALOGUE OF LUNAR FORMATIONS
FIRST QUADRANT--
West Longitude 90 deg. to 60 deg.
West Longitude 60 deg. to 40 deg.
West Longitude 40 deg. to 20 deg.
West Longitude 20 deg. to 0 deg.
SECOND QUADRANT--
East Longitude 0 deg. to 20 deg.
East Longitude 20 deg. to 40 deg.
East Longitude 40 deg. to 60 deg.
East Longitude 60 deg. to 90 deg.
THIRD QUADRANT--
East Longitude 0 deg. to 20 deg.
East Longitude 20 deg. to 40 deg.
East Longitude 40 deg. to 60 deg.
East Longitude 60 deg. to 90 deg.
FOURTH QUADRANT--
West Longitude 90 deg. to 60 deg.
West Longitude 60 deg. to 40 deg.
West Longitude 40 deg. to 20 deg.
West Longitude 20 deg. to 0 deg.

MAP OF THE MOON
First Quadrant
Second Quadrant
Third Quadrant
Fourth Quadrant

APPENDIX
Description of Map
List of the Maria, or Grey Plains, termed "Seas," &c.
List of some of the most Prominent Mountain Ranges, Promontories,
Isolated Mountains, and Remarkable Hills
List of the Principal Ray-Systems, Light-Surrounded Craters, and
Light Spots
Position of the Lunar Terminator
Lunar Elements
Alphabetical List of Formations

INTRODUCTION

We know, both by tradition and published records, that from the e