Roach Remedy
A few drops of turpentine sprinkled around where roaches gather will exterminate them at once.
Source: 1001 Household Hints, Ottilie V. Ames
Death to Insects
Two pounds of alum dissolved in three or four quarts of boiling water and applied to all cracks and crevices, will keep out ants, roaches, spiders, bedbugs, etc., etc.
Source: 76: A Cook Book
To Destroy Insects and Vermin
Dissolve two pounds of alum in three or four quarts of water. Let it remain over night till all the alum is dissolved. Then with a brush, apply boiling hot to every joint or crevice in the closet or shelves where croton bugs, ants, cockroaches, etc., intrude; also to the joints and crevices of bedsteads, as bed bugs dislike it as much as croton bugs, roaches, or ants. Brush all the cracks in the floor and mop-boards. Keep it boiling hot while using.
Source: The White House Cookbook, F.L. Gillette