bubble level for watchmaker's transit
Datecirca 1930
Inventory Number1997-1-1834b
ClassificationLevel
Subject
Maker
C. F. Casella & Co. Ltd.
founded 1905
User
Institute of Geographical Surveying, Harvard University
circa 1930
User
Institute of Geographical Exploration
1929 - 1952
Cultural Region
Place of Origin
Dimensions2.8 × 7.5 × 13.1 cm (1 1/8 × 2 15/16 × 5 3/16 in.)
Material
DescriptionThis bubble level belongs to a watchmaker's transit (1997-1-1834a). It has two graduated windows and is likely filled with alcohol. The chamber is held by precision screws in two A-frame brackets. These grip the upright frame of the transit so that the level remains horizontal (as opposed to striding across the top of the instrument).
Signedunsigned
ProvenanceInstitute of Geographical Surveying, Harvard University.
Historical AttributesUsed by the Institute of Geographical Surveying, Harvard University.
C. F. Casella & Co. Ltd.
Date: circa 1930
Object number: 1997-1-1833b
C. F. Casella & Co. Ltd.
Date: circa 1920
Object number: 1997-1-1670
C. F. Casella & Co. Ltd.
Date: circa 1920
Object number: 1997-1-1669
C. F. Casella & Co. Ltd.
Date: early 20th-mid 20th Century
Accessories: wood carrying box containing the counter, in three parts; (9) glass slides; (2) red cardboard boxes labeled "1/4 Oz micro circles, in. 3/4 No.1"; (1) red cardboard box labeled, "DNC / 2/6"; (1) green cardboard box labeled "1/2 oz No 88138, non-corrosive Micro Cover Glasses, 18 m/m Circles No.1".
Object number: 1998-1-0858
C. F. Casella & Co. Ltd.
Date: circa 1920
Accessories: case
Object number: 1989-1-0028
W. & L. E. Gurley
Date: ca. 1884
Accessories: solar attachment; case; level; green filter; sun shade; tripod (5163b)
Object number: 5163a