HER MOTIONS, ASPECT, SCENERY, AND PHYSICAL CONDITION. BY RICHARD A. PROCTOR, B.A. CAMBRIDGE, Honorary Secretary of the Royal Astronomical Society; AUTHOR OF 'THE SUN," SATURN AND ITS SYSTEM," "THE ORBS AROUND US," ESSAYS ON ASTRONOMY," OTHER WORLDS THAN OURS," ETC. ETC. "With how sad steps, O Moon, thou climb'st the sky,- "Art thou pale for weariness Of climbing heaven and gazing on the earth, Among the stars that have a different birth,- And ever changing, like a joyless eye That finds no object worth its constancy ?"-SHELLEY. WITH THREE LUNAR PHOTOGRAPHS BY RUTHERFURD (ENLARGED BY BROTHERS) AND MANY PLATES, CHARTS, ETC. LONDON: LONGMANS, GREEN, AND CO. 1873. (All rights reserved.) Q B 581 .p96 WYMAN AND SONS, PRINTERS, GREAT QUEEN STREET, LINCOLN'S-INN FIELDS, LONDON, W.C. 52313 NYU LIBRARIES UNIVERSITY HEIGHTS PREFACE. ALTHOUGH I had long purposed to draw up a treatise on the Moon, to form part of the series of volumes to which my works on Saturn and the Sun appertain, I originally proposed that this treatise should be the last instead of the third of that series. But Mr. Brothers being desirous of publishing three of Mr. Rutherfurd's magnificent lunar photographs, asked me to prepare some accompanying letterpress, and the present work thus had its origin; for I soon found that if I supplied the required quantity of letterpress, I should to some extent injure the prospects of the more complete work which I had in view. Moreover, it seemed to me desirable not to take up the subject partially and resume it at some distant epoch, but to deal with it in a single effort. This will serve to explain the delay which ensued; for certain parts of my subject-matter required much time and close application, for their thorough and independent investigation. I ought also (for reasons which will be understood by subscribers to the large volume) to explain that Mr. Brothers and I found it convenient to separate our interests; so that while I provide |