89

Fig- 37-

Horne & Thornthwaite’s Starfinder (Fig. 37). This instrument consists of a miniature equatorially-mounted telescope, and two eyepieces, by means of which any celestial object whose catalogue position is known can be found, and various other sidereal problems solved. Full particulars are sent with the instrument, which may be obtained, set to any latitude, £5 15s. 6d. and £8 8s.

ASTRONOMICAL REFLECTING TELESCOPES.

Horne & Thornthwaite beg to give notice that all specula in the following Lists are manufactured under their immediate supervision, and are personally tested, both optically and on celestial objects ; they can, therefore, guarantee their excellence.

Horne & Thornthwaite’s Portable Equatorially-mounted Newtonian Telescope.' Page 36, Figs. 20 and 21.

Telescope with 6-inch silvered-glass mirror, with equatorial motions ... £20

The same, with divided circles .. .... ............. .. ... £2\

Telescope as above, with 6^-inch mirror and improved motions in right

ascension and declination, divided circles ... .....................£35

The iron pillars for these equatorials are made firm and heavy when they are intended to be left in situ, but when required for transport from place to place,: they are made of a lighter form.

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