TRANSCRIBER’s NOTE:

The constelation Boötis also appears in the original spelt as Bootis and Böotis these have all been corrected to Boötis without being noted below. Also variations in hyphenation remain unchanged.

The following typos are corrected in this e-text and are shown within the text as replaced by.

	Original	Replaced by
Page 4	Many of the speculas	Many of the specula
Page 7	on the pitch	or the pitch
Page 24	and proceed	and proceed.
Page 28	kept is glass	kept in glass
Page 31	See p. 27, Fig. 4	See p. 20, Fig. 4
Page 39	(prices for 8-1/2 then 6-1/2)	(prices for 6-1/2 then 8-1/2)
(appendix)
Page 14	Rev. W. P. Matthews	Rev. W. P. Matthews
Page 24	(a 10 in. Alt Azimuth.	(a 10 in. Alt Azimuth).
Page 32	Rev. E. A. Fishbourne, M.A.	Rev. E. A. Fishbourne, M.A.