Chautauqua Institution, The Chautauquan, Vol. 05, February 1885
“ You may get a manufactured berry, you may get chiccory; to avoid this careful tests must be applied and only reliable firms patronized. Nothing but unbrowned coffee should be bought; the roasting should be done at home. This process requires particular care. The coffee berry is hard and horny, water has no effect upon it even when it has been ground. It must be roasted in order that certain constituents may become soluble. These constituents are a fragrant volatile oil called caffeone, and the caffeine, which is identical with the theine of tea. ”
