ON the EXTENSION of BODE'S EMPIRICAL LAW of the DISTANCES of the PLANETS from the SUN to the DISTANCES of the SATELLITES from their RESPECTIVE PRIMARIES, by JAMES CHALLIS. INSCRIBED by CHALLIS on the title page: "From the Author". Unfortunately the top margin of the title page has been clipped off, probably on purpose to remove the recipient's name which would have been right above the inscription. Published by CAMBRIDGE UNIVERSITY and Printed by J. Smith, Printer to the University, 1829. First Edition. Disbound from a bound volume with remains of stitching still attached to the spine, 8.5x10.5 inches, 15 pages. GOOD Condition: Top margin of title page clipped off, as noted above, not affecting printed text; neat ink number in the upper corner of every other page; crease to the bottom corner and bottom margin, overall still bright, clean and clear. About James Challis (excerpted from Wikipedia): James Challis, b. 1803 d. 1882, was an English clergyman, physicist and astronomer. Professor of Astronomy and Experimental Philosophy and the Director of the Cambridge Observatory. He investigated a wide range of physical phenomena.