Instruments & Innovation

"The collimators and observing telescopes have apertures of 50mm., and focus by rack and pinion. Two 60 degree prisms of heavy flint glass and of 70mm. side are furnished with the instrument. The mirror may be used in…

Top figure is a laboratory spectrometer with a polarizing attachment. Lower figure is a spectrometer with a third arm and camera attachment.

Top figure is a Foucault heliostat, which reflects the rays of the sun in a horizontal direction. Bottom figure is a two-mirror heliostat, where the second mirror allows the path of the light beam to be thrown in any…

An "instrument intended for measuring spectra photographs, gratings, divided scales, or such objects which can be focused by the microscope and will allow rapid measurements of the highest possible accuracy." The design…

"For studying the reflection, refraction, absorption and polarization of radiant heat."

"The instrument is designed after suggestions from Prof. D. B. Brace, for whom a number of these instruments were built."

"This spectroscope will show the first order of spectrum all at once across the field of the eyepiece."

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).