Göttingen Collection of Mathematical Models and Instruments

	(405) Vector integrator according to Föttinger		(469) Polar integraph of prof. M. Franck
	(501) Instrument for the composition of harmonic vibrations		(523) Machine from Rottsieper for the calculating of the Poisson integral for the circle
	(525) Integraph from Abdank-Abakanowicz Coradi		(526) Moment planimeter from Amsler
	(527) Integraph from Coradi		(528) Bar planimeter according to H. v. Sanden
	(529) Bar planimeter according to H. v. Sanden		(531) Polar planimeter with calibration circuit
	(532) Polar planimeter with calibration ruler		(534) Optical planimeter from Schnöckel
	(535) Spherical planimeter from Schnöckel		(536) Polar planimeter
	(537) Planimeter		(538) Harp planimeter from Oldendorp
	(553) Integration triangles from Thaer		(556) Harmonic analyzer from Mader
	(557) Harmonic analyzer from Henrici		(560) Integraph from Naatz-Blochmann
	(563) Ruler made of celluloid from du Bois and R. Rothe		(564) Machine for the integration of the Riccati differential equation
	(574) Wooden model of a polar planimeter