Jones, Linus Hale2024-04-262024-04-26191910.7275/847t-2w38https://hdl.handle.net/20.500.14394/44689The action of formaldehyde as a stimulant to plant growth revives the so-called law or hypothesis of Arndt (1)** that substances toxic to the living plant may, in very dilute concentrations, act as a stimulant. In general, between the toxic and stimulative concentrations there is the gradation of the former into the latter. This gradation may properly be called "toleration". (See plate 1.)FormaldehydePlant regulatorsThesis (Open Access)(OCoLC)14907084