miner's compass
Datecirca 1900
Inventory Number5121
ClassificationMiner's Compass
Subject
Dimensionsinstrument: 21.1 × 11.5 × 10 cm (8 5/16 × 4 1/2 × 3 15/16 in.)
case: 10.3 × 13.4 × 13.4 cm (4 1/16 × 5 1/4 × 5 1/4 in.)
case: 10.3 × 13.4 × 13.4 cm (4 1/16 × 5 1/4 × 5 1/4 in.)
AccessoriesAttachment
Curatorial RemarksLabel inside of box lid says "THOMAS HALL, OPTICIAN, BOSTON."
FunctionThe surveyor's compass is an instrument used in surveying (or in navigation in rare cases) to measure horizontal angles, what is called bearing or azimuth.
For a nice discussion of this intrument, see the following website.
For a nice discussion of this intrument, see the following website.
Lafontaine
Date: circa 1850
Accessories: two attachments for tripod mounting (one with a universal joint), case
Object number: DW0689
W. & L. E. Gurley
Date: circa 1880
Accessories: 2 tripod attachments 2 sights
Object number: 5159
Samuel Thaxter & Son
Date: 1822-1843
Accessories: mahogany box with brass hinges and hooks; two mounting attachments; detachable slit sights; tripod, see 1996-1-0059b
Object number: 1996-1-0059a
Henry Hughes & Son, Ltd.
Date: 1900-1915
Accessories: instruction manual for instrument is in box of disassembled parts.
Object number: DW0141c
English
Date: circa 1880
Accessories: square oak box
Object number: 5324
Object number: 1998-1-1422