Forgeries

This method of detecting forgeries has been devised by Professor M. Bruylauts, professor of chemistry in the University of Lonvain. The portion of a document whioh is suspected of having been altered is first moistened, and then, after being dried, is exposed to the action of vapor of iodine. The portion thus moistened, if it has been altered, assumes a violet tint, while the other portion appears a brownish yellow. This action is evidently due to the reinoval of a portion of the starch contained in the size of the paper. The same process will even reveal the existence of pencil marks erased bv rubbin?.