3684. Bad water should be filtered.—(See pages [42], [43].)
3685. Tea and coffee are the best and least hurtful stimulants.
3686. Liebig, with his chemical discoveries, demonstrates that they have become necessaries of life to all nations; that they were both originally met with amongst nations whose diet is chiefly vegetable; and by contributing to the formation of bile, their peculiar functions have become a substitute for animal food to a large class of the population whose consumption of meat is very limited, and to another large class who are unable to take regular exercise.
3687. In making coffee, observe that the broader the bottom and the smaller the top of the vessel, the better it will be.
3688. Substitute for Cream in Tea or Coffee.—Beat the white of an egg to a froth, put to it a very small lump of butter, and mix well. Then turn into it gradually, so that it may not curdle. If perfectly done, it will be an excellent substitute for cream.—(See page [352].)