Usage examples for caffeine

  1. The housewife who would feel condemned in purchasing caffeine put up as a drug somehow feels justified when she extracts it from plant products in the regular preparation of the meal. – Physiology and Hygiene for Secondary Schools by Francis M. Walters, A.M.
  2. Sure you got your caffeine tablets? – Triplanetary by Edward Elmer Smith
  3. The active principle of tea is called theine; that of coffee, caffeine, and of cocoa, theobromine. – A Practical Physiology by Albert F. Blaisdell