Rare Text Book on Pharmacognosy. Still recommended and required reading in college courses.
Contents: What is pharmacognosy? -- Drugs and technical products -- Crude drugs -- Commerce in drugs -- Preparation of drugs for the commercial market -- Official and unofficial drugs -- The evaluation of drugs -- The chemical classification of drugs -- Carbohydrates -- Glycosides -- Tannins -- Lipids -- Volatile oils -- Resins and resin-combinations -- Alkyloids -- Endocrine products -- Vitamins and vitamin-containing drugs -- Enzymes and enzyme-containing drugs -- Proteins and related substances -- Antibiotics -- Immunizing biologicals -- Allergens and allergenic preparations -- Pesticides -- A taxonomic list of important drugs -- Powdered drugs and a key for identification of powders.