ere submitted, which it will be obvious that when an object presents a few years ago, to the late Prof. Henry, of the Smith- axis is coincident with a line proceeding perpendicu- itself we can ascertain which field of view it is in only by sonian Institution, with a view to having their practical… … adjusted so as to see a single star, and that jective or object glass. In such telescopes an BINOCULAR COMET SEEKER. when directed to a single star such an object would be visible whose light would be instrument would be sure to see two images too feeble to be seen in the field of an ordinary…
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.
![An illustration from Bicknell's village builder. Elevations and plans for cottages, villas, suburban residences, farm houses [etc.] also exterior and interior details for public and private buildings, with approved forms of contracts and specifications. Containing fifty-five plates drawn to scale (1872)](https://img.insideoutlibrary.com/img/200/ia-bicknellsvillage00bick-195-183.webp)
