LARGE ELEGANT SCISSOR-HINGE PARALLEL RULE

LARGE ELEGANT SCISSOR-HINGE PARALLEL RULE

Stock Number: 10211

$2950.

For sale, lovely 18th century scissor-hinger parallel rule. Made of wood, with brass linkage. Attractive and functional.

Dimensions

12 inches (30 cm) wide

Circa

c. 18th century

Country of manufacture

UK and Ireland

Categories: Maritime, Navigational instruments

Description

LARGE ELEGANT SCISSOR-HINGE PARALLEL RULE, English, 18th century. This lovely mixed-material rule is constructed of a dense tropical wood, finely shaped and pierced brass linkage, and ivory edge rails, one beveled down and one elevated. It is a full 12″ (30 cm) long, and expands to 6-1/2″ (16.5 cm) high using the two brass knobs. There is no right or left shift thanks to the scissor linkage with two ends riding in slots. Condition is fine noting light wear. The size is remarkable for this form, most 18th century scissor rules being approximately 6″ long. We have had one other large one by Thomas Wright, c. 1735 (Tesseract Catalogue 87 item 28), plus an all-brass one by Jeremiah Watkins c. 1800 (Tesseract Catalogue 96 item 16). 

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US TESSERACT

David and Yola Coffeen both have enjoyed academic careers, as planetary astronomer and as linguist/educator. But since 1982 (yes, 1982!) they have been full-time dealers in early scientific and medical instruments, under the name Tesseract. Selling primarily by catalogue (over 100 issued so far) they also have a web presence at www.etesseract.com, and can be contacted at mail@etesseract.com.

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