page_title: Craig telescope
hierarchical_section_title: Craig telescope
caption_attribution_description: English: Identifier: familytutor05lond (find matches) Title: The Family tutor Year: 1851 (1850s) Authors: Subjects: Self-culture Publisher: London&#160;: Houlston and Stoneman Contributing Library: Harold B. Lee Library Digitizing Sponsor: Brigham Young University View Book Page: Book Viewer About This Book: Catalog Entry View All Images: All Images From Book Click here to view book online to see this illustration in context in a browseable online version of this book. Text Appearing Before Image: with meat. They are verylarge, and destructive to crops. Of the birds in China, there are theeagle, the falcon, the magpie, crows, spar-rows, cormorants, curlews, quails, larks,pheasants, pigeons, the rice-bird, andmany species of aquatic birds. Cormo-rants are used by the Chinese for catchingfish. The falcon is imperial property, andthe magpie is sacred to the reigningfamily. Fish form a very important part of thefood of the Chinese, and great cax*e istaken in raising them in artificial fish-ponds. The gold and silver fislies arekept in glass globes as ornaments.Among the fish eaten are the cod, stur-geon, mullet, carp, perch, sea-bream, &amp;c.;crab-fish and oysters are common on thecoast. The larger species of reptiles are un-known in China. Frogs, lizards, andfresh-water tortoises are common. Venom-ous serpents are very rare. The insects ofChina are numerous. The silkworm is themost important, affording employment andriches to thousands of the inhabitants. 354 THE CRAIG telescope; Text Appearing After Image: THE CRxVIG TELESCOPE ON WANDSWORTH COMMON. A stupendous telescope has been con-structed on Wandsworth Common, underthe general superintendence of Mr. Gravatt,for the Rev. Mr. Craig, Vicar of Leam-ington. It consists of a brick tower, 64feet in height, and 15 feet in diameter,with a long tube slung at its side. Thelength ojf this tube, which is shaped some-what like a cigar, is 76 feet; but with aneye-piece at the narrow end, and a dew-cap at the other, the total length in mse will be 85 feet. The design of the dew-cap is to prevent obscuration by the con-densation of moisture which takes place-during the night, when the instrument ismost in use. Its exterior is of brightmetal, the interior is painted black. Thefocal distance varies from 76 to 85 feet.The tube at its greatest circumferencemeasures 13 feet, and this part is about 24feet from the object-glass. The determi-nation of this point was the result of re-peated experiments, and minute and care-ful calculations. It was essential Note About Images Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.
context_page_description: The Craig telescope was a large telescope built in the 1850s, and while much larger than previous refracting telescopes, it had some problems that hampered its use. Its unique design and potential caused a great deal of excitement in its day. The telescope was ready in August 1852 and was visited by William Parsons, 3rd Earl of Rosse, famous for the Leviathan of Parsonstown, a reflecting telescope and the largest telescope of this age with a six foot mirror.
context_section_description: The Craig telescope was a large telescope built in the 1850s, and while much larger than previous refracting telescopes, it had some problems that hampered its use. Its unique design and potential caused a great deal of excitement in its day. The telescope was ready in August 1852 and was visited by William Parsons, 3rd Earl of Rosse, famous for the Leviathan of Parsonstown, a reflecting telescope and the largest telescope of this age with a six foot mirror.
caption: An illustration of the Craig Telescope
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