Beehive shelf

Beehive Shell An improvised beehive shelf can be obtained from empty tin can. The tin can to be used for the purpose should be rust free and its inner and outer surfaces are either galvanised or varnished. To make a beehive shelf drill a hole of 1/2" diameter in the centre of the bottom of tin can and cut a V-shaped notch on one side of it. This can now be used as a beehive shelf. 

Preparation In the laboratory oxygen gas is prepared by heating, a mixture of potassium chlorate (4 parts) and manganese dioxide (1 part), in a hard glass test tube fitted with a delivery tube. The. other end of the delivery tube is placed under beehive shelf kept immersed in a through of water. Over the beehive shelf is... 

The beehive shelf is depicted in Graham s Elements of Chemistry but may be earlier. The flat shelf with a hole, supported from the sides of a rectangular glass trough, is shown in Mitscherlich s Lehrbuch der Chemie. ... 

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