To get rid of bed-bugs
To get rid of “red rovers” (or bed-bugs) simply apply a good, thick coat of varnish to all lurking places.
OR
Get a clean oil-can, fill it with gasoline and inject into all cracks and crannies where they can possibly hide. Shut the room up for some hours to give the gasoline a fair chance to do its work.
To get rid of rats and mice
Smear the entrance of their holes with liquid tar, and spray the holes as far as a bellows will carry it with powdered, unslaked lime;
OR
After the holes are located, fill them deeply with absorbent cotton; moisten with formaldehyde; the holes are then quickly cemented with plaster of paris. Then let the neighbors do the worrying.
For mange in cats
Mix vaseline with a drop of two or diluted carbolic acid, as put up in the drug stores as an antiseptic and healing salve. A very little placed on the affected part and a clean linen rag tied around it will heal the skin and cause a new growth of fur.