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Scientific American, Vol. 42, No. 24 (June 1880) (1880)
leaf 4
oportion to the square trench upon the domain of the table microscope, but to meet in the instrument produced, the effect upon the eyes is yet requirements for which the latter is not adapted. The table of the diameter of the objective, it follows that a single refracting telescope cannot be made… … of thirty inches focal length; after some time the astrono- The core, S, is connected with a wire, R, with a lever Fig. l.-HOLCOMBE'S ELECTRIC LIGHT APPARATUS. © 1880 SCIENTIFIC AMERICAN, INCPatents · Patented · Boiler · Oysters · Piston · Binocular · Scientific American · Feet · Sewing machine · Needle points · Comet seeker · Norwalk iron · Binocular vision · Iron works · Focal length · Steam engine · Magnifying power
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