transit
Datecirca 1910
Inventory Number5170a
ClassificationTransit
Subject
Maker
Bausch & Lomb Optical Company
1853-present
Cultural Region
Place of Origin
Dimensionstransit: 31.5 × 26.5 × 16.5 cm (12 3/8 × 10 7/16 × 6 1/2 in.)
case: 39.5 x 21 x 29.2 cm (15 9/16 x 8 1/4 x 11 1/2 in.)
case: 39.5 x 21 x 29.2 cm (15 9/16 x 8 1/4 x 11 1/2 in.)
Material
Accessoriescarrying case; dust caps (2); sunshades (2); extra eyepiece; tripod (5170b)
DescriptionThe transit is made of a primary telescope (the secondary telescope originally mounted on top of this one is missing) supported by two "inverted-U" columns. The telescope has one focusing knob, a variable power eyepiece, shades and cross hairs. On one side is a vertical graduated circle and under the telescope is a compass within which are embedded two perpendicular bubble levels forming an "L" shape. This structure pivots in the horizontal plan and its position is finely determined by two vernier scales, equipped with glass reflectors. It rests on a sturdy mount with four leveling screw. The latter is fixed to a tripod.
One can also read: Patented Sept. 1 1903. Jan. 30 1903. When not in use, the transit and its accessories are stored in a wooden carrying box.
One can also read: Patented Sept. 1 1903. Jan. 30 1903. When not in use, the transit and its accessories are stored in a wooden carrying box.
Signedon instrument: BAUSCH & LOMB OPTICAL CO.
Curatorial RemarksAccording to this transit's serial number (8016), it would have been built circa 1910. This information is taken from the following <a href="http://www.surveyhistory.org/how_old_is_my_bausch_&_lomb1.htm" target="_blank">website</a>.
ProvenanceFrom the Department of Engineering, Harvard University.
Buff & Buff Manufacturing Company
Date: circa 1910
Accessories: carrying case; sunshades (2); dust cap; trivet; tripod (5177b)
Object number: 5177a
Heller & Brightly
Date: circa 1908
Accessories: carrying case; plumb bob; tripod (5167b)
Object number: 5167a
Stackpole and Brother
Date: circa 1885
Accessories: carrying case; dust cap; tripod (5168b)
Object number: 5168a
W. & L. E. Gurley
Date: circa 1910
Accessories: carrying case; dust cap; small tool; sunshade; key; plumb bob chain; tripod (5176b)
Object number: 5176a
American
Date: circa 1790
Accessories: Large brass key for tightening joints
Object number: 5006
W. & L. E. Gurley
Date: ca. 1884
Accessories: solar attachment; case; level; green filter; sun shade; tripod (5163b)
Object number: 5163a
John H. Temple
Date: 1850-1870
Accessories: carrying case; dust cap; leather straps; tripod (5166b)
Object number: 5166a
C. L. Berger & Sons
Date: circa 1925
Accessories: Original wood box, hand magnifier 3.5X (2008-1-0051b), brass collar
Object number: 2008-1-0051a
Fauth & Company
Date: 1874-1905
Accessories: bubble level
Object number: 1997-1-1808
See also/See also
