Evening Republican, Volume 21, Number 52, Rensselaer, Jasper County, 11 March 1918 — Good for Some Love Letters. [ARTICLE]

Good for Some Love Letters.

A letter written with a solution of iodide of starch in water is perfectly legible for a few days. It Is not, properly speaking, in the “invisible” category—at all events, for a while. But writing thus made has the advantage that after a week or two it fades out and vanishes forever, leaving no evidence that can be used against tta author.