Another aneroid barometer

Stretch a piece of thin rubber in excess of the mouth of a small glass jar. Wind thread or string over the rubber to secure it and then put a ring of household cement under the edges of the rubber sheet which have been trimmed off. Cut a thin circle from the finish of a cork and glue this to the centre of the rubber. Next glue a long broom splint or soda straw to the cork. Cut a little wooden triangle from a match stem and glue to the edge of the bottle so that the splint or soda straw rests on it.