Search using this query type:

Search only these record types:





Advanced Search (Items only)

Crabtree rule

https://s3.amazonaws.com/omeka-net/15303/archive/files/1dc10b22e46287e8a99f0faca13cf29a.JPG
https://s3.amazonaws.com/omeka-net/15303/archive/files/ef4270412c28462ccd4a742a8dac25fe.JPG
https://s3.amazonaws.com/omeka-net/15303/archive/files/f7f6fd356f9cfc73cc49f02af3ba8cf4.JPG
https://s3.amazonaws.com/omeka-net/15303/archive/files/9b016895752b9c0869af117a627e6ed8.JPG
https://s3.amazonaws.com/omeka-net/15303/archive/files/854cb0895b28d6df4219a4954872b2b2.JPG
https://s3.amazonaws.com/omeka-net/15303/archive/files/fdd5488eca86280edcd2ee9ecd3ea8a0.JPG
https://s3.amazonaws.com/omeka-net/15303/archive/files/d03310624c5b11f2b604aabb08c6f199.jpg
https://s3.amazonaws.com/omeka-net/15303/archive/files/224ace1865fcf4c7fbf8db2460b6c81b.JPG
https://s3.amazonaws.com/omeka-net/15303/archive/files/7a1906449578bf45c7cf08b131af480c.jpg
https://s3.amazonaws.com/omeka-net/15303/archive/files/895e0c9ec030f05f17ce1be3cb5aaab1.jpg

Dublin Core

Title

Crabtree rule

Subject

survey instrument

Description

This Parallel Line Rule is a heavy-weighted object, suitable for life on flat surfaces. All of its part are made of brass, which is a sturdy and relatively inexpensive material. The rule is slightly tarnished but has no discernible damage. This would suggest it was a desk object and well taken care of.
It was made by H.S. Crabtree around 1930, and was eventually collected by famed Canadian surveyor Louis Sebert who collected older, non-technical objects for nostalgic purposes. In 2003 Sebert's wife handed the instrument to the Museum of Science and Technology in Ottawa where it has been ever since.
References:
Archive.org
http://archive.org/stream/uoftreportgov1944univ/uoftreportgov1944univ_djvu.txt
http://www.archive.org/stream/n01ontariosession65ontauoft/n01ontariosession65ontauoft_djvu.txt?keepThis=true&TB_iframe=true
MARCH 4
Smithsonian Online
http://americanhistory.si.edu/collections/search/object/nmah_690215
Individual Collections
http://www.mathsinstruments.me.uk/page39.html
Royal Museum Greenwich
http://collections.rmg.co.uk/collections/objects/42814.html

Creator

H. S. Crabtree ltd. Toronto, circa 1930

Date

circa 1930's: made/marked by H. S. Crabtree
2003: collected by Museum of Science and Technology

Format

Bass (all parts)
severe in appearance with distinctly shaped hinges that are most notably associated with H. Hughes & Son design from England.
heavier than an average parallel rule, about 2 lbs.

Language

English

Type

mathematical instrument used for drawing parallel lines on a chart or graph

Identifier

2004.0015.1

Coverage

Canadian survey instrument
Ontario, Canada