From a very early age onwards, people's attention had been attracted to the volatile substances, characterized by strong smells or flavours, which are among the large variety of substances which form within plants; these were used partly for therapeutic purposes,… — Otto Wallach Copy Share Image
The lawlessness of frontier life in America has been pictured as a remarkable phenomenon. In reality, it was the natural consequence of indiscriminate mixing of volatile substances. — Paul Harris Copy Share Image
