KENDAL, 1878.

DEAR SIR,—After four months use of the telescope I had of you (an

8-1/2 in.), I am able to tell you that I am much pleased with its

great excellence. The definition of the mirror is very fine, and its

performance on the Moon being superb, with so high a power as 700.

The stand I find very steady and convenient, and the screw motions

very smooth.

I am, dear Sir,

Yours truly,

(_Signed_.)

Mr. G. CALVER.

* * * * *

_From_ E. A. FRY, Esq.

New Edition of Hints on Silver-Glass Reflecting Telescopes Manufactured by Mr. G. Calver, F.R.A.S. with Directions for Silvering, Adjusting, &c. · 第 57 / 62 题