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Drying towers and columns are used to purify or dry common laboratory gases such as nitrogen or hydrogen. In typical laboratory use they are filled with a dry dessicant material such as KOH, activated molecular sieves, or calcium chloride and then the gas is slowly flowed through the tower.
Expansion of Liquids Apparatus. Comprising five removable glass tubes in a sliding frame and supported in a water trough. For demonstrating the different thermal expansions of various liquids. Comprising five glass tubes in a frame and supported in a water trough.
A tall, horizontally subdivided container for fractional distillation in which vapour passes upwards and condensing liquid flows downwards. The vapour becomes progressively enriched in more volatile components as it ascends, and the less volatile components become concentrated in the descending liquid, which can be drawn off.
A gas washing bottle consists of a (usually) cylindrical bottle/flask with a female ground glass joint, where a specialized male ground glass joint stopper with two glass tubes can be attached. The stopper has two external glass tubes, one enters the stopper from one side, taking a 90° angle and extends until near the bottom of the flask, while the other is connected directly to the stopper.
Equilateral prisms are often used for breaking up white light into a spectrum of colors (also see our diffraction gratings), while right angle prisms are generally used for measuring critical angles and observing total internal reflection such as in fiber optics.
Proof Plane 
Reagent bottles 
Ammonium Aluminium Sulfate 
Ammonium Ferrous Sulphate-500g 
Gas Jar With lid 
