THE PLANETS FOR FEBRUARY. Mercury rises about half-past 6 in the mornings at the beginning of the month: it passes from Sagittarius to Aquarius during February. 1st R.A. 19 15 28 Dec. S. 21 38 Diameter 6" 4 28th Venus is in the constellation Pisces during February, and arrives at its greatest easterly elongation on the 25th of the month. It is very favourably situated for observation, and is an excellent object for the transit instrument, passing the meridian from the 1st to the 15th at five minutes past 3 in the afternoon. 1st R.A. 23 51 43 28th I 34 21 Dec. S. I 2 N. 12 22 Diameter 19" 24" 4 Illuminated portion of the disc of Venus=0*571. Mars continues in the constellation Taurus, and although decreasing in size, is still a fine object. 1st R.A. 4 12 58 28th "9 4 55 32 Dec. N. 23 42 Diameter 9"4 7" Jupiter rises about a quarter to 5 o'clock in the morning at the beginning, and about a quarter past 3 o'clock at the end of February. It passes from Ophiuchus to the borders of Sagittarius during the Saturn may now be observed in the south-east, rising at the beginning of the month about midnight, and at the end of the month about 10 o'clock. 28th 16"6 Dimensions of ring :—outer major axis, 40′′; outer minor axis, 11". Uranus continues visible in the evening. The following are the Minor Planets which will arrive at Opposition this month. Full particulars will be found in the Supplement to the Nautical Almanac for 1868. THE NEW PLANET, announced in our last as No. 82, has been named Alcmene. 335 Meridian passage of Venu 3 14 Conjunction of Moon and Mars, 5° 13' N. 6331 Occultation of B. A. C. 2nd Ec. D. 18 39 49 7 26.8 1468 (6) 14 3 Reappearance of ditto Conjunction of Moon and 16 18 Occultation, Disappearance of 26 Geminoruni (5) . 8 20'0 9 12.2 Mon 13 3 5 Meridian passage of Venus, 2nd Tr. I. Sh. E. 17 56 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. Achromatic Refractor, 10 ft. focal length, 8 in. aperture, by Cooke & Sons, Equatoreally mounted, with finder, eyepieces, micrometers, &c., complete. [47] Equatoreal Telescope, 5 ft. focus, 4 in. aperture; powers 60, 340, and 450, on extra stout mahogany tripod stand, steadyingrods, levels, large finder, &c., complete. [18] Achromatic Telescope, 5 ft. focus, 3 in. aperture, Equatoreally mounted on strong garden tripod, with eyepieces, &c., complete, price low. [41] Achromatic Refractor, 46 in. focus, 3 in. clear aperture, by Dollond, on extra stout tripod stand, with steadying-rods, finder, &c., in case, complete. [40] Astronomical Refractor, focal length 4 ft. aperture 3 inches, complete on a Portable Universal Equatoreal Stand. [3] Achromatic Refractor, 44 in. focus, 3 in. aperture, on a Fraunhofer's Universal Equatoreal Stand. [7] Achromatic Refractor, 4 ft. 6 in. focal length, 3 in. aperture, by T. Cooke & Sons, Equatoreally mounted, on tripod stand. [36] Achromatic Refractor, aperture 3 in., by T. Cooke & Sons; 5 celestial eyepieces, powers 20 to 240, terrestrial and diagonal eyepiece, finder, &c., on tripod stand, with steadying rods complete. [ 48 ] Achromatic Refractor, 4 ft. focal length, 3 in. clear aperture, by Wray; two celestial and one terrestrial eyepiece, on garden stand. [46] Achromatic Refractor, 4 ft. focal length, 3 in. aperture, on brass tripod stand, with achromatic finder, 3 celestial and 3 terrestrial eyepieces, &c. Achromatic Refractor, 40 in. focal length, 2 in. aperture, by T. Cooke & Sons, on stout tripod stand. Newtonian Reflector, 7 ft focus, 7 in. aperture, 8 eyepieces, powers from 30 to 360, Equatoreally mounted. [20] [45] Transit Instrument, 5 ft. focus, 3 in. aperture, Ys fitted with agates, for mounting on stone piers. [29] Equatoreal Mounting (for Latitude 51 or 52), adapted for a telescope of 6 or 7 ft. focus.-12-inch circles, driving apparatus, &c., all of the most approved construction." [5] 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. [16] Astronomical Observatory, built of wood, 16 ft. by 8 ft., adapted for Equatoreal, Transit, and Clock; could removed. Price moderate. be easily [38] Recreative Science: complete in numbers, half price. [30] Star Maps. The Large Maps of the S.D.U.K., strongly and neatly bound in whole cloth; very nearly new. TELES [42] ELESCOPE FOR SALE.-One of Messrs. SOLOMON'S £5 ASTRONOMICAL REFRACTING TELESCOPES to be SOLD, nearly new. Focal length 44 in., clear aperture 2. Price Four Guineas, with terrestrial eyepiece, table tripod stand, and box, complete. [31] H FOR SALE -an excellent REFLECTING TELESCOPE, focal length 7 ft., aperture 7 inches, mounted so far Equatoreally that with a little care it may be turned on a star or planet in the day-time. -Four eyepieces.-Price £20 only (less than the cost of the stand), the proprietor having mounted a larger instrument. [11] F A CHROMATIC TELESCOPE FOR SALE, 10 ft. focal length, 6 in. clear aperture, by Goddard, with finder of 2 in. aperture, six eyepieces, powers from 20 to 1,000, mounted on a mahogany stand upon a new and improved principle.-Apply to Mr. S. Corke, Auctioneer, &c., Sevenoaks, Kent. TELESCOPE FOR SALE.-5 ft. achromatic, 3 in. aperture.Equatoreally mounted on strong tripod stand. Dewcap, finder, movable counterpoises, eyepieces to 220, &c. Price only £13 138. The observatory space being needed immediately for another instru ment. A CHROMATIC TELESCOPE FOR SALE. [41] I -10 ft. focal length, 8 in. clear aperture, by Cooke & Sons, of York, with finder, eyepieces, and micrometers. The instrument is mounted in the completest manner on the German system, and is similar to the large instrument by the same makers in the Exhibition of 1862. It is in perfect order and equal to new in all respects. [ 47 ] J INSTRUMENTS, &c. WANTED. Equatorial Mounting Wanted for a 6 or 7 ft. Telescope, with or without graduated circles, cheap. [43] 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. third volume wanted: a good price will be given. . The [26] |
