The shoemaker's ball

Prior to the invention and distribution of the light bulb, the so called shoemaker's ball was a widespread tool. Many craftsmen used it in their workshops, like wood carver, tailors or shoemakers.

A shoemaker's ball as can be seen in the picture on the right, consists of an empty glass globe which is filled with water. For using it is installed at a certain height on a tripod.

Have you got an idea what the ball was used for?

a) The shoemaker's ball was applied to use the daylight in a better way for working.

b) The ball was used to enlarge small objects to be able to work more exactly.

c) The shoemaker's ball was used to cool down objects which were heated up while used for working.

d) The shoemaker's ball was used to warm up the fingers to be able to work better.