2 Demonstration Carbon-Rod Microphones, c. 1920

2 Large Demonstration Measuring Instruments, c. 1920

2 German Wood Diptych Sundials, 18/19th Century

Slate Sundial, 19th Century

2 Nuremberg Pantochronometers, early 19th Century

Cube Sundial with Compass by David Beringer, c. 1800

Persian Compass with Gnomon, c. late 19th Century

Tellurium and Lunarium by Ernst Schotte, Berlin, c. 1890

German 3-Inch Diameter Terrestrial Pocket Globe, late 19th Centu

Smith & Son 2 1/2-Inch Diameter Terrestrial Pocket Globe, c. 184

Length Measure 1 Hanover Foot, c. 1850

Terrestrial and Celestial Globe as Bookends, c. 1955

2 Small Terrestrial Globes

Rath's Historical Celestial Globe, c. 1965

Lot of Scales and Weights

Miehe Sliding Microtome, c. 1925

Swedish Aneroid Barograph, c. 1900

2 Cased Sets of Technical Drawing Tools

2 Early Drawing Instruments, c. 1850

Physical Demonstration Apparatuses, c. 1900

Mineralogical Lever Balance in Original Box, c. 1865

Large Vacuum Pump with Two Vertical Glass Barrels, c. 1910

Geometric Forms for Physics and Maths Lessons, c. 1900

Electrical and Electrostatic Demonstration Apparatuses, c. 1900

Polarisation Apparatus According to Nörremberg, c. 1900