selves to be as near to perfection as the the two spectra—that produced artificially and that number 14,438 to the linear inch. This number is re- art of the optician can attain, while the mounting from a celestial body—can be studied most satisfac- garded as the best for general work. The ruling… … A A. Steel support roCs ou end of telescope. 15 Obeerving teleerope, 23^ in. focns, -i^ in. aperture. C. Collimator. D. RevereioD attachment, containing a Christie half prism and reversion prism E. Keversion micrometer, i. Prism and refraction grating table. G. Qradnated circle and vernier. H H.…
Patents · Contained · Patented · Telescope · Scientific American · American supplement · Address munn · Horse power · Express money · Electric light · Declination axis · Slow motion · Water gas · Practical treatise
Internet Archive · Public domain (published before 1931). Free to use for anything.
