Instruments & Innovation

Instruments designed for photometric analysis. Photometers can be used to measure the presence and concentration of organic and inorganic compounds in solution by determining the absorbance of specific wavelengths of…

Quadrant electrometer and electrometer for radioactive measurements.

Spectroscopes use a lens or prism to disperse light into wavelengths. The spectroscopes shown can be handheld (top image) or attached to a camera (bottom image) to record the observation.

Apparatus for showing the principles of an induction or alternating current motor; demonstrating the rotating magnetic field.

From page 97: "These cells show the extraordinary property which selenium possesses of changing its electrical resistance under the influence of light."

Apparatus for showing Tesla's experiments with electricity.

Illustration of possible combinations of laboratory equipment on the "Universal Physical Laboratory Supports."

Static electricity generator used for experiments and powering X-ray machines.

Various vacuum tubes for cathode ray demonstrations, including Crookes' Tubes, Holtz' Tube, and Lenard's Tube.

Wave apparatuses for the study of transverse and longitudinal waves.

No. 1639. Parabolic Reflectors, used to collect sound, light or radio waves.
No. 1641. Melloni's Apparatus, for demonstrating the phenomena of absorption, polarization, reflection and refraction of radiant heat.

Steam and gas engines.

Instrument that measures the wavelengths of light through a chemical sample. Can be used to determine elements in a sample when different elements emit different wavelengths of light. Illustrated instrument made by…

"The Geryk" mechanical air pump for high vacua. English pump (Fleuss' patents).

No. 2213 is a Dynamo Analysis Apparatus, an electrical generator.

Various Geissler tubes for demonstration purposes. Invented by the glassblower, Johann Heinrich Wilhelm Geissler (1815-1878), a light is produced when an electric current is passed through the rarefied gas filled tubes.

"This apparatus was designed to supply our own laboratory with an electro-magnet of sufficient strength and field concentration for magnetizing, experimentation, etc. With its accessories listed below it becomes…

"Parsons' latest improved design, for controlling incandescent lighting circuits, and for demonstrating the laws of series and parallel combinations."

Instruments for measuring both voltage and amperes of direct electric current.