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INSTRUMENTS, &c. FOR SALE.

These Notices, which are restricted to three lines each, are inserted free of charge to subscribers: applications respecting prices and other particulars to be made to the Editor, with a stamped envelope for reply, without which no answer can be sent.-For Advertisements with prices and more complete details, a small charge will be made. N.B. It is particularly requested that we may be informed when instruments are disposed of, in order that the notice may be withdrawn, and fruitless applications prevented.

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Achromatic Refractor, 7 in. aperture, 9 ft. focus, by Troughton & Simms; 5 celestial and I terrestrial eye-pieces; on large garden Equatorial stand, with patent steadying rods, &c. [54] Achromatic Refractor, 5 ft. 3 in. focus, 4 in. aperture, by Cooke & Sons; finder, 2 in. aperture, 3 eye-pieces, illuminating apparatus, &c., but no stand; price low. Achromatic Refractor, 3 in. aperture, 42 in. focus, 4 eye-pieces, finder, &c., Equatorially mounted. Achromatic Refractor, 4 ft. focus, 2 in. aperture, 3 pancratic eye-pieces, powers 60 to 200, with pillar and claw and garden tripod stand.-Would be sold or exchanged for a larger. [61] Achromatic Refractor, 2 in. aperture, 42 in. focus, on tall tripod, with finder, 5 astronomical and 1 terrestrial eye-pieces, sunshades, illuminating mirror for transit wires, in mahogany case. [ 62 ] Gregorian Refractor, 43 in. aperture, 2 ft. focal length, by Dollond; 4 powers, 50 to 200, finder, &c., complete; on massive brass table stand.

[63] Silvered Glass Speculum, 12 in.; ditto, 8 in.; and metal speculum, 8 in.; the two latter, 6 ft. 6 in. focal length, are fitted with tubes, &c.

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[66] The large

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Specula (unmounted) of a Newtonian Telescope. metal, 6 in. aperture, 66 in. focus, divides n Coronæ perfectly, and strongly elongates y Andromedæ. Transit Instrument, 5 ft. focus, 3 in. aperture, Ys fitted with agates, for mounting on stone piers. Equatorial Stand, adapted for a 5 or 6 ft. telescope: 13 in. circles divided on silver, reading to 10" of space and 4s. of time.-Has never been used. ́ Improved Varley Stand, with rackwork movements, adapted for a telescope of 5 or 6 ft. focus: fixed upon a circular turn-table, so as to be easily pointed in any direction. Polar Axis of mahogany, 7 ft. long, adapted for a 4 ft. telescope, with 12 in. circles, reading to minutes. [ 56 ] Speculum Grinding Apparatus, capable of working a 7 ft. speculum: with tube and fittings for a in. Newtonian. [57] Brass Orrery, designed by and formerly the property of the late Dr. Pearson, and purchased by the present owner at his sale of instruments in 1853.

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Recreative Science: complete in numbers, half-price. 30

TO BE SOLD, an excellent 8-in. SILVERED GLASS SPECU

LUM, in brass cell, made by Mr. WITH, of Hereford, either with or without its tube also a Flat Mirror. The Mirror will be sold cheap, the advertiser intending to set up a larger instrument. The Speculum will easily divide Zeta Cancri, and occasionally Gamma 2 Andromeda.-Apply to W. Matthews, Hill House, Gorleston, Yarmouth.

ACHROMATIC REFRACTOR, 3 in. aperture, 42 in. focus,

4 eye-pieces, transit eye-piece, sun-glasses, finder, dew-cap. Equatorially mounted, with circles reading by microscopes to 2 s. and 10"; level, rack, and clamps in R.A. and Dec., &c. Price £34. [ 067 ]

TO BE SOLD, the owner being about to mount a much larger

instrument, a 12 in. SILVERED GLASS SPECULUM; an 8 in. ditto ditto; and an 8 in. Metal ditto. The two latter are fitted with tubes and finders, and are 6 ft. 6 in. in focal length; the 12 in. is unmounted, and its focal length is 10 ft. 4 in. These Specula are all of them guaranteed to be of the finest quality, and will be disposed of at a very moderate price. [N66]

INSTRUMENTS, &c. WANTED.

Equatorial Stand Wanted--adapted for a 5 ft. Refractor, with graduated circles; second-hand, at a moderate price. [35] Monthly Notices of the Royal Astronomical Society. The third volume wanted: a good price will be given. [26] Celestial Globe wanted, not less than 18 inches in diameter, with the necessary circles, for a small Observatory. Address, Mr. Cuming, Workhouse, Williton, Somerset. [70] Astronomical Clock wanted immediately; not necessary to be a very first-class one, therefore the price must be low. [65] Wanted a copy of the German edition of Beer and Mädler's large Map of the Moon. [ 69 ]

ASTRONOMICAL REGISTER.

LIST OF SUBSCRIBERS-Names received since our last number.

Coventry, T., Esq., 5 Tavistock Square.

Cuming, R., Esq., Workhouse, Williton, Somerset.

Elger, T. G. E., Esq., Bedford.

Grover, C., Esq., Red Lion Street, Chesham, Bucks.

Johnson, J., Esq., 7 Atherton Street, Manchester.

Massey, T., Esq., Ludlow.

Rylands, T. G., Esq., Heath House, Warrington.

N.B. We intend publishing a revised list of our regular Subscribers at the beginning of next year. Those gentlemen whose names we have not received, and who wish them to appear in the list, will please forward to us the necessary information as soon as possible.

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We can in no case insert communications from correspondents with whose names and addresses we are unacquainted.

R. B. W.-Received and under consideration, but the subject is rather threadbare.

We have received a great number of Returns of Private Observatories; but as we expect several more, they will not be handed to Mr. De la Rue until the meeting in December.

ERRATA. In the Appendix to No. 35, page 3, line 9 from the top: for rocking, read rolling. Line 3 from the bottom: for force of the two other motions, read sum of the two other motions.

The Astronomical Register is intended to appear at the commencement of each month; the Subscription (including Postage) is fixed at Three Shillings per Quarter, payable in advance, by postage stamps or otherwise.

The pages of the Astronomical Register are open to all suitable communications: Letters, Articles for insertion, &c., must be sent to the Editor, Mr. S. GORTON, Stamford Villa, Downs Road, Clapton, N.E., not later than the 15th of the month.

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