Chills
Use heat. Apply hot-water bags under arms, on thighs and at feet. Give hot foot bath, in which is 1 tbsp. mustard. Rub limbs toward body, to restore circulation. Give hot coffee or tea, or hot lemonade. Wrap in blankets and put to bed. Chills indicate oncoming illness — see doctor!
Source: The Mary Frances First Aid Book, Jane Eayre Fryer
Cure for Chills and Fever
Quinine is the only remedy, and taken in the following manner, will cure successfully : Have twenty grains of quinine put up in five grains powders ; after you have had the chill, and the fever has passed off, take one powder (five grains), then in four or five hours take the same quantity again, and so on until you have taken the twenty grains. You will then escape your chill the third day. Before the seventh day comes around (they come on periodically every seventh day) take the same quantity as before just as if you had had a chill. Keep this treatment up for six or eight weeks, and you will be entirely restored. I think will never have a return of ague.
Source: The Housekeeper’s Friend: A Practical Cookbook