Collection

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BRASS CYLINDER CONDUCTOR

ELLIOTT BROTHERS WATER CURRENT METER

ARAGO DISK

DOUBLE SCOPE ECCENTRIC THEODOLITE

ELECTRIC FLY aka "ELECTRIC WHIRL" with Bells

PLANE TABLE ALIDADE

FRIEDRICH LUX GAS BALANCE

ACHROMATIC DUPLEX PRISM

LARGE GEISSLER TUBE ROTATOR

SEISMIC INSTRUMENT EARTHQUAKE DETECTOR

DANIEL'S HYGROMETER

TRANSIT THEODOLITE

AMPERE'S STAND or APPARATUS

THOMPSON'S TWO-COIL REFLECTING ASTATIC GALVANOMETER BY ELLIOTT BROS.

BERTHELEMY/LEPETIT THEODOLITE

PIXII Hair HYGROMETER of the Saussure Design

PRECISION SPHEROMETER

ABBADIE'S REFLECTING THEODOLITE

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