Harrison Enterprises

Comprising two glass tubes, both approximately 220mm long x8mm inside diameter, one closed at the top ad the other tube open. Their lower ends are connected together by 1 meter of rubber pressure tubing. Both tubes are mounted on sliding brackets, which may be locked in any position on the metal supporting rods. The stand is of polished wood, and carries a scale graduated from 0 to 100cm with millimeter divisions in the centre ad figured every cm up either side.

About 20cm in diameter by 44 mm wide, turned and carefully balanced, mounted on a horizontal shaft held in bell bearings. The wheel is marked and pointer is fixed to the brackets. The brackets have 4 holes and can be fixed to the wall also.

Ring and Ball Apparatus is a classic physics experiment used to demonstrate thermal expansion of solids. The set includes a solid brass ball and matching brass ring mounted on a strong rod with a comfortable wooden handle, allowing the user to safely heat the ball over a flame and test it with the ring. At room temperature the ball passes easily through the ring. After heating, the ball expands and no longer fits, clearly showing how metals expand on heating and contract on cooling. This makes the concept easy to understand for students during practical classes. Ideal for school, college, B.Sc. and engineering physics laboratories, this apparatus is durable, reusable and designed for repeated demonstrations in classrooms, laboratories and science fairs..

Newton's Ring Microscope (also called a Newton Ring Apparatus), a specialized precision optical instrument used primarily in physics laboratories to study the phenomenon of light interference

This image shows a Laboratory Spectrometer, a precision optical instrument used for analyzing the properties of light by breaking it into its component colors (spectra). It is commonly used in physics labs for experiments such as measuring the refractive index of a prism or observing diffraction patterns from a grating.