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Signature	Maker	Instruments	Comments	Location	References
ONDERDEWIJNGAART CANZIUS, JACOB HENDRIK	Holland, fl.1771-1838, MIM OIM PHIM SIM	Circumferentors = D., Soth. 11/1687; Telescope = Frisian Maritime Museum, Sneek; Microscope, Dellebarre-type, 1806 = KEN; Air Pump = UTR; Bathometer = APS.	designed and manufactured scientific instruments; he had the first factory in Holland for this purpose, 1797; the microscope in the KEN is also marked "A. Dellebarre."	Delft.	Rooseboom 1; Brieux 2; Crommelin 1; Multhauf 1; Daumas 1; Clay and Court; Nachet; Mörzer Bruyns 2; USNM; RSW.
ONDERDEWIJNGAART CANZIUS, JACOB HENDRIK	Holland, fl.1771-1838, MIM OIM PHIM SIM	Circumferentors = D., Soth. 11/1687; Telescope = Frisian Maritime Museum, Sneek; Microscope, Dellebarre-type, 1806 = KEN; Air Pump = UTR; Bathometer = APS.	designed and manufactured scientific instruments; he had the first factory in Holland for this purpose, 1797; the microscope in the KEN is also marked "A. Dellebarre."	Delft.	Rooseboom 1; Brieux 2; Crommelin 1; Multhauf 1; Daumas 1; Clay and Court; Nachet; Mörzer Bruyns 2; USNM; RSW.

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