THE JELLY TEST
The jelly test is based on the comparative resistance power of the various glue-jellies. Several mechanical devices for determining jelly-strength have been perfected. One of these consists of a brass vessel which rests upon the glue-jelly, and into which shot is poured; the weight of the cup and the contained shot upon having penetrated to a certain depth in the glue-jelly, gives a figure which expresses the comparative strength of the jelly with the standard.