Negretti & Zambra's Encyclopaedic Illustrated and Descriptive Reference Catalogue of Optical, Mathematical, Philosophical, Photographic and Standard Meteorological Instruments, Manufactured and Sold by Them

Negretti & Zambra's Encyclopaedic Illustrated and Descriptive Reference Catalogue of Optical, Mathematical, Philosophical, Photographic and Standard Meteorological Instruments, Manufactured and Sold by Them

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 188? edition. Excerpt: ...ditto with Vertical and Horizontal adjustments (fig. 1308) 1309 Ditto ditto Brass head, with, jointed Clip, or Cradle Telescope-holder, mahogany legs (fig. 1309) 1309 Improved Alt-Azimuth Stand (fig. 1309), for Astronomical Telescopes, well suited for Telescopes, Nos. 1313 and 1314; Strong Metal Mountings, very rigid, and conveniently portable 12 00 1500 Captains' or Pilots' Binocular Night or Look-out Glasses (see pages 272, 273). 3 3 0 4 10 0 FIG. 1310. 1310 Negrettiand Zambia's "Universal" Telescope (fig. 1310). Messrs. NEGRETT1 And ZAMBRA, in view of the increasing demand for Astronomical Telescopes of moderate price, have constructed one that, while it accomplishes effectually all required in the fctndy of the heavenly bodies, is equally useful as a Telescope for Terrestrial Objects, or for marking in Rifle Piactice. The "Universal" i8 furnished with an Achromatic Ol, ject Glass, three inches diameter, with an Astronomical Eye-piece, magnifying 140 diameters, and Terrestrial Eye-piece, magnifying 60 diameters. It will show Jupiter's moons, Saturn's ring and moons, and resolve some of the double stars; while for Terrestrial Objects it will define well at a distance of ten to fifteen miles, and will show a bullet mark on a Target at the longest ranges. For astronomical purposes, an Extra Eye-piece can be added, magnifying 200 diameters. The cost is 12s. 6d., and ic can be applied at any time. Messrs. Nrgretti And Zambra have also arranged Telescopes similar to the above, but of very much better finish, price 8 8s., 10 10s. Firm Tripod Garden Stands for above, 3 10s. to i 10s.; see also previous page. 1311 Fig. 1311. NEGRETTI AND ZAMBRA'S SIGNAL STATION OR TELEGRAPH LOOK-OUT TELESCOPE. Negretti...show more

Product details

  • Paperback | 192 pages
  • 189 x 246 x 10mm | 354g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236839668
  • 9781236839664