Parallelogram Protractor, by John Rowley, London, c. 1700 (MHS Record Details: Inventory number 32319)

Parallelogram Protractor, by John Rowley, London, c. 1700

Object is on display.
Inventory Number:	32319
Object Type:
Persons:	John Rowley
Date Created:	c. 1700
Place Created:	London England United Kingdom Europe
Accession Number:	1925-43
Brief Description:	English brass recipient angle or parallelogram semicircular protractor. Signed, "I. Rowley fecit"; undated; c.1700. The semicircle is graduated from 0° to 180° in each direction, and this particular protractor is fitted with adjustable rulers. Instruments of this type were used in the plotting of fortifications.
Primary Inscriptions:	Signed, "I. Rowley fecit"
Provenance:	Lent by Christ Church, Oxford in 1925.
Collection Group:	Orrery Collection
Narratives Mathematical instruments by John Rowley Inventory no. 32319 - Former Display Label Bennett, J. and Johnston, S., The Geometry of War, 1500-1750 (Oxford, 1996) Former Display Label - The Orrery Collection of Scientific Instruments Former Display Label - The Principal Makers of Instruments in the Orrery Collection Orrery Collection: 1731 Inventory Orrery Collection in print Accession Record : Extract from Annual Report for 1925

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