Memoir on a Trans-Neptunian Planet, Memoirs of the Lowell Observatory Volume 1 No. 1, 1915. OFFPRINT [PREDICTION OF A PLANET BEYOND NEPTUNE: PLUTO]
Lynn, MA: Thos. P. Nichols & Son Co, 1915. 1st Edition. FIRST EDITION, OFFPRINT IN ORIGINAL WRAPPERS OF VOLUME I OF LOWELL’S PREDICTION OF THE EXISTENCE OF A PLANET BEYOND THE ORBIT OF NEPTUNE, here also calculating its probable position. 9 plates are included. Lowell's 1903 hunch about the existence..... More