We present a diagrammatic illustration of the Edison quadruplex, battery key system, in Fig.

In this relation I append a diagrammatic illustration of a peculiar wound shown to me by Mr. Hanwell.

Waller's Diagrammatic Illustration of the Reflex Process.

Diagrammatic illustration from Gegenbaur, to show the relation of the dorsal branchial-gut cavity (r) to the pharyngeal or hypobranchial groove (n).)