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Signature	Maker	Instruments	Comments	Location	References
BLAGRAVE, JOHN	England, b.1558? d.1612,		designed many fine astronomical and surveying instruments, including his Mathematical Jewel, Uranical Astrolabe, three-legged compass, running staff, armillary sphere, etc; author.	Reading.	Taylor 1(52); Dewhirst; Gunther 1 and 4; Michel 1, 2 and 3; Engelmann 1; D. King; DNB; ADL; John Collins; Blundeville; John Palmer; RSW.
BLAGRAVE, JOHN	England, b.1558? d.1612,		designed many fine astronomical and surveying instruments, including his Mathematical Jewel, Uranical Astrolabe, three-legged compass, running staff, armillary sphere, etc; author.	Reading.	Taylor 1(52); Dewhirst; Gunther 1 and 4; Michel 1, 2 and 3; Engelmann 1; D. King; DNB; ADL; John Collins; Blundeville; John Palmer; RSW.

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