The graphic telescope is a type of camera lucida that has the power of a telescope. It was invented by Cornelius Varley in 1809.[1] It can be used to draw broad landscapes.
Graphic telescopes allow the size of the projected image to be adjusted.[2] They can be used separately, or with a portable table to reduce vibrations.[1][3] They may also be mounted in a vehicle.[4]
See also[edit]
References[edit]
- ^ a b "Cornelius Varley". www.gracesguide.co.uk. Grace's Guide to British Industrial History.
- ^ "Camera Lucida & Varley Graphic Telescope - Victoria and Albert Museum". Victoria and Albert Museum. 28 December 2010. Archived from the original on 28 December 2010.
- ^ "Original ad for graphic telescope".
- ^ "Cornelius Varley's Patent Graphic Telescope". Cloudy Nights.
External links[edit]
- Camera lucida and Varley Graphic telescope
- "Using the Patent Graphic Telescope" (video).
- "The graphic telescope and Varley's artwork". www.sites.hps.cam.ac.uk. Whipple Museum of the History of Science. (includes 1840 magazine article on instrument)
- A picture of a Graphic telescope, another.
Well, that’s interesting to know that Psilotum nudum are known as whisk ferns. Psilotum nudum is the commoner species of the two. While the P. flaccidum is a rare species and is found in the tropical islands. Both the species are usually epiphytic in habit and grow upon tree ferns. These species may also be terrestrial and grow in humus or in the crevices of the rocks.
View the detailed Guide of Psilotum nudum: Detailed Study Of Psilotum Nudum (Whisk Fern), Classification, Anatomy, Reproduction