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Telescope 19TH CENTURY "G. Bracher London for E. A. Kutz New York"
19TH CENTURY SMITHSONIAN MUSEUM PIECE
THIS TELESCOPE IS IN BRASS MEASURING 37 INCHES LONG AND HAS SIX TUBES.
SHE IS ALMOST IN PERFECT CONDITION EXCEPT FOR A SMALL DENT NEAR THE EYE PIECE.
Ref: Gloria Clifton, Directory of British Scientific Instrument Makers, 1550-1851 (London, 1995), p. 36.
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Charles Smart, The Makers of Surveying Instruments in America Since 1700 (Troy, N.Y., 1962), pp. 99-100.
Sailors use telescopes of long-focal length to sight distant ships and landfalls. Most eighteenth-century telescopes of this sort had drawtubes made of wood or cardboard. Nineteenth-century instruments were made with brass drawtubes covered with rope, wood or canvas. Most nautical telescopes have a multi-element eyepiece that shows an erect image. And since John Dollond's British patent of 1758, most have been equipped with an achromatic objective lens.
THIS INFORMATION COMES FROM THE SMITHSONIAN ‘NATIONAL MUSEUM OF AMERICAN HISTORY.IT ALSO HAS ONE IN THEIR MUSEUM.
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