Evening Republican, Volume 21, Number 228, Rensselaer, Jasper County, 11 October 1917 — How Gas Smothers Plants. [ARTICLE]

How Gas Smothers Plants.

From an investigation of the poison; Ing of park vegetation near gas works, it appears that the green coloring matter in plants is affected and gradually disappears. With the soil charged with gas, asphyxiation, through lack of oxygen in the roots, checks assimilation and the formation of new substance in the plant cells. The first change to be noticed is a drying of the edges of leaves and other green parts, and the lessening of transpiration thus caused gives an accumulation of water that tends to rot and kill the stalk at the base.

Investigators in Bavaria have found that the more bread schoolchildren eat the better the condition of their teeth.