OF OPTICAL INSTRUMENTS. 119 



FIG. 1350. 



FIG. 1369. FIG. 1374. 



1348. Day or Night Telescope, specially for use at sea, being so arranged as to admit 



the greatest amount of light in dark or foggy weather, with mahogany body 

 and spray shade, one or two draw . . . 18 6 



1349. DAY OE NIGHT ACHEOMATIC PILOT TELESCOPE, one or two draw, with sun- 



shade, and covered with leather, . . 17 6 and 150 



1350. DAY OE NIGHT TELESCOPE, of superior quality, with large object glass (fig. 1350) 



1 10 



1352. DECK TELESCOPE, very superior, with larger object glass, and increased means of 



illumination, mahogany or covered with leather . . 2 10 



1353. The Midshipman's Telescope, of taper form, one draw lf-inch. object glass, light 



and portable, covered with leather, 2 feet when shut, with sling straps 



220 



1354. MIDSHIPMAN'S TELESCOPE, lf-inch. object glass, Government regulation pattern, 



2 feet when shut, with navy signals, sun-shade and sling straps (Jig- 1354) 

 p. 122 2 10 



1355. THE NAVY TELESCOPE, 30-inch., one draw, taper form, with 2-inch, object glass 



and straps . . . . '* 2 15 



1356. Signal Telescope, 3 feet, with taper body, covered with leather, one draw, with 



2i-inch. object glass . 3 10 



The above three telescopes, as well as the three following, combining as they do great light and 

 power, together with superior portability, are fast supplanting all others in the Royal and 

 Mercantile Navy. 



1357. MAEINE TELESCOPE, taper form, much improved, 30 inches when shut, drawing 



out to 36 inches, with extra large eye-piece for increase of light, 25-inch, 

 object glass, with caps and portable strap attached, as useful and good an 

 instrument as a naval officer need have . . . 400 



1358. MEECHANT OE NAVY SIGNALS, affixed to either, at 5s. 6d. extra. 



1359. COMPASS, fitted to cap of ditto, 5s. 6d. to 15s. 



1360. MAEINE TELESCOPE, one draw, 40 inches when shut, 2f-inch. object glass, with 



pancratic tube to increase or diminish the power, and adapt it at pleasure for 

 dark or clear weather, the light and power of this glass showing clearly an 

 amount of distant detail, often of the utmost importance on board ship 5 10 

 1362. Taper Telescope, as above, 50 inches when closed, with 3J-inch. object glass, an 

 important instrument, as also No. 1366 or 1367, for pilot stations, lighthouses, 

 as well as telegraph signal stations along the coast . . 7 10 



