Göttingen Collection of Mathematical Models and Instruments

	(225) Areas and curves of constant width and constant perimeter		(226) Areas and curves of constant width and constant perimeter
	(228) Areas and curves of constant width and constant perimeter		(380) Ellipse handle bar: two constant points of a line
	(404) Fluid element instrument according to Hele-Shaw		(513) Calculating machine Adix
	(514) Calculating clock of Wichmann		(515) Calculating machine Trick
	(516) Slide rule		(517) Special slide rule
	(518) Measuring instruments		(519) Slide rule
	(520) Japanese calculating machine		(539) Kartometer from Tesdorpf-Fleischhauer
	(541) Curvimeter		(543) Kings Patent calculator
	(550) Calculating plaque from Proell		(584) Mehmke's machine for the resolution of algebraic equations
	(585) Mehmke's machine for the resolution of complete cubic equations		(874)
	(900) Russian abacus		(932) Adding device Arithma
	(933) 2 Slide rules		(934) 2 Slide rules
	(942) Digital solar clock