Birth Control

The one method that was extant in the seventeenth and eighteenth centuries is the condem. It's made of animal duts, but it's really understood as a venereal disease preventive not as much as a contraceptive. The idea is that women could do that, possibly without even their partners knowing. One of them they recommend soaking a sponge in vinegar or some other mildly acid solution that will both act as barrier and a spermicide.