_a_ _b_ _c_ B _a-b_ _b_-B _a-c_ _P._ 178 xx. _Delphini._—[7-1/2, 8, 16, 9: 14″·3, 0″.7, 20″.] Smyth 16 by evanescent glimpses; easy 164 power, 6-1/2 in. 8-^m. well elongated in direction of 230°, power 430.
REGENT ROAD, GREAT YARMOUTH, _October 24th, 1874_.
DEAR SIR,—Doubtless you have anticipated hearing from me, relative to the 10 inch telescope, but the weather has been so indifferent for delicate astronomical work, that it has not yet had a fair trial.
In middling good air, when I could use a reduced aperture with satisfactory results, the star images reminded me of the 6-1/2 inch, which I considered so superb a mirror that nothing could surpass its fine performance either on stars or planets.
With the recollections of the truly splendid views I had of Jupiter last season, I count much to see him with the 10 inch.
REGENT ROAD, GREAT YARMOUTH, _February 2nd, 1875_.
DEAR SIR,—In reply to yours, I have not had a really good night to test severely the defining powers of the 10 inch mirror, but judging from the few difficult objects I have seen, the mirror promises well, and I have no doubt of its excellence.
I had a fine view of the grand nebula in Orionis, and noticed that the 5th and 6th stars were quite plainly seen, when the aperture was reduced to 5-1/2 inches. I consider your stand a great improvement, being very convenient and steady.
AM STREET, EDINBURGH, 8-1/2″ ALT. AZIMUTH. _February 25th, 1878_.
DEAR SIR,—I have found no difficulty in putting up the instrument, and the adjustments do not appear to be hard to manage. It is a very beautiful instrument, and the case with which its movements are made is extraordinary.
I am, dear Sir, Yours faithfully, (_Signed_.) Mr. G. CALVER.
TOWN HALL SQUARE, BOLTON, _September, 1877_.
DEAR SIR,—Last night, through a break in the clouds, I managed to get my first look with the telescope (an 8-1/2″). I turned it on delta Cygni. The definition was rather fluttering, but a 6-1/2 in. stop enabled me to see it well with 170; the first time I have ever divided this star[2] the colour was obvious. I then tried Pi Aquilæ, which was beautifully divided. I am much pleased with the instrument and its performance, and when I do get a fine night I expect great things from my 8-1/2 in.