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Retort(?), glass, German, by F. Schbaum of Bonn, f

1901-1950

Geissler tube, 1855.

1855-1876

Clinical centigrade thermometer

1851-1910

Clinical Fahrenheit thermometer

1851-1900

Official UK copy of the Bonn GSM mobile phone agreement, 1987

1987

Pink celluloid Portio cap

Clear glass burette, made by C. Gerhardt, Bonn, German, 1890-1930

Clear glass burette made by C. Gerhardt

1890-1930
Dry and Wet bulb thermometers. On Brass stand, by Geissler, 1876.

Dry and Wet bulb thermometers. On Brass stand

1876
One of two ordinary mercury-in-glass centigrade thermometers, signed Dr H. Geissler, Bonn, and marked in Cyrillic T.0.O. No.244 [........]. Scale -45 to 47 degrees

Ordinary mercury-in-glass centigrade thermometer

Two ordinary mercury-in-glass centigrade thermometers, signed Dr H. Geissler, Bonn, and marked in Cyrillic T.0.O. No.244 [........]. Scale -45 to 47 degrees

Two ordinary mercury-in-glass centigrade thermometers

Walferdin's overflow mercury thermometer for recording maximum temperatures made by H. Geissler and Müller, Bonn, Germany, 1840-1898

Walferdin's Maximum Mercury Thermometer, 1840-1898

1840-1898
Penis irrigator in form of glass tube with tubulure near closed end, flared mouth, by F.A. Eschbaum, Bonn, Germany, 1901-1940

Penis irrigator in form of glass tube with tubulure near closed end

1901-1940
One of two ordinary mercury-in-glass centigrade thermometers, signed Dr H. Geissler, Bonn, and marked in Cyrillic T.0.O. No.244 [........]. Scale -45 to 47 degrees

Ordinary mercury-in-glass centigrade thermometer

Wolz oil lamp, for microscopy, made by Kalthoff, German, 1885-1890

Wolz oil lamp

1885-1890
Model of the Moon, 19 feet in diameter (half hemisphere), made by Thomas Dickert in Bonn and based on the lunar maps by Dr Julius Schmidt. Constructed at the University of Bonn in the mid 1850s, the model was later sold and sent to America before being acquired by the Field Museum in Chicago where it was displayed until the 1980s.

Model of the Moon

1850-1854