the matter it turned her protest by inflicting the common penalty. of a single telescope of like aperture and focal length, for we out that the astronomer had nearly lost the use of one of The far-off problems of space, and many of the nearer know that twice as much light enters two eyes as enters… … dent of every other proof this fact at distances varying from one to ten alone demonstrates that two eyes double feet. As it is mounted on a tripod it can be the illumination of all images of external SECTION OF BINOCULAR COMET SEEKER. objects formed on the retina; again there- stationed among the…
Patents · 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
Internet Archive · Public domain (published before 1931). Free to use for anything.
