General catalogue of the manufactures of Adam Hilger, Ltd (1928)
Hilger, Adam · London EN · leaf 39
shed bright with the greatest care, l< 13. is illuminated from above by a mirror. This bright pointer is adjustable laterally by the two milled head screws helow, so that one can always return to the standard reading by setting the bright pointer on a reference line. t . •Slide with liAt filters to… … Gauss Eyepieces.—This is a positive, or Ramsden, eyepiece with a plane class inclined at 46* to the optical axis, placed between the two lenses. Light enteritis through an aperture in the side of the tube is thrown by the mirror on to the webs A clear space is left in the middle of the mirror…
Spectrometer
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
