transit
Datecirca 1908
Inventory Number5167a
ClassificationTransit
Subject
Maker
Heller & Brightly
1870 - 1968
Cultural Region
Place of Origin
Dimensionsinstrument: 32.9 × 20.7 × 29.4 cm (12 15/16 × 8 1/8 × 11 9/16 in.)
case: 33.1 × 24.8 × 34.7 cm (13 1/16 × 9 3/4 × 13 11/16 in.)
case: 33.1 × 24.8 × 34.7 cm (13 1/16 × 9 3/4 × 13 11/16 in.)
Material
Accessoriescarrying case; plumb bob; tripod (5167b)
DescriptionThe telescope is fixed between two "inverted-V" columns. The telescope has one focusing knob, shades and cross hairs. Fixed under it is a bubble level. A graduated circle with vernier is used to measure the telescope's angle. Two sighting vanes fixed to the columns were used for the determination of right angles. Under the telescope is a compass and two perpendicular bubble levels, forming an "L" shape. This structure pivots in the horizontal plan and its position is finely determined by a tangent screw and two vernier scales, one with an ivory reflector. It rests on a sturdy mount with four leveling screw. The latter is fixed to a tripod.
The instrument was stored in a carrying case when not in use. There is a plumb bob inside the case, suggesting that this transit was of the mining type.
The instrument was stored in a carrying case when not in use. There is a plumb bob inside the case, suggesting that this transit was of the mining type.
Signedon instrument: Heller & Brightly / Makers Philad'a 7907
Curatorial RemarksThe date is taken from the table found on the following <a href="http://www.surveyhistory.org/how_old_is_my_heller_&_brightly1.htm" target="_blank">website</a>, according to the transit's serial number (7907).
ProvenanceFrom the Department of Engineering, Harvard University.
Stackpole and Brother
Date: circa 1885
Accessories: carrying case; dust cap; tripod (5168b)
Object number: 5168a
Bausch & Lomb Optical Company
Date: circa 1910
Accessories: carrying case; dust caps (2); sunshades (2); extra eyepiece; tripod (5170b)
Object number: 5170a
Buff & Buff Manufacturing Company
Date: circa 1910
Accessories: carrying case; sunshades (2); dust cap; trivet; tripod (5177b)
Object number: 5177a
John H. Temple
Date: 1850-1870
Accessories: carrying case; dust cap; leather straps; tripod (5166b)
Object number: 5166a
W. & L. E. Gurley
Date: circa 1910
Accessories: carrying case; dust cap; small tool; sunshade; key; plumb bob chain; tripod (5176b)
Object number: 5176a
Buff & Buff Manufacturing Company
Date: circa 1905
Accessories: wood case; leather case; right-angle prism; plumb bob; oil flask; tripod (5174b)
Object number: 5174a
W. & L. E. Gurley
Date: ca. 1884
Accessories: solar attachment; case; level; green filter; sun shade; tripod (5163b)
Object number: 5163a
Frederic W. Lincoln Jr. & Company
Date: circa 1880
Accessories: carrying case; sunshade; dust cap; tripod (5164b)
Object number: 5164a
William J. Young & Sons
Date: 1870-1875
Accessories: carrying case; dust cap; sunshade; leather belt strap; tripod (5165b)
Object number: 5165a
Andrew Yeates
Date: circa 1840
Accessories: case, second eyepiece, plumb bob
Object number: 5235
Fauth & Company
Date: 1874-1905
Accessories: bubble level
Object number: 1997-1-1808
See also/See also
