Typtology is a method of communication with spirits by means of rapping with various codes being arranged for the purpose. Thus sitters may read the alphabet aloud, or slowly pass a pencil down a printed alphabet, the rappings indicating the correct letters that when joined together form a message or answer to the question propounded. One rap could signify the answer “yes” while two could mean “no.” A.G.H.

Sources: 2, 317; 81, 418.