(From the same Gentleman.)
Droylsden Rectory, Manchester,
July 30th, 1880.
My Dear Sir,—I can scarcely express to you the pleasure I have had in the use of your splendid 6-1/2 in. mirror. Both in light grasping power, and in the separation of close double stars, it has far surpassed my highest expectations, and quite removed the prejudice I entertained against reflectors. Though possessing a first-class 4-1/4 in. refractor, equatorially mounted in my observatory, I now use your mirror in preference, in the more difficult and delicate observations, and with it am able to master the most severe tests given for 6-1/2 in. aperture. I would not be without one of your finely figured mirrors, now that I have tested their merits, for any consideration.
(Signed.)
Mr. G. Calver.
(From the same Gentleman.)
The Rectory, Droylsden,