EDITORIAL NOTES.

Milk and Electricity.  —An Italian scientist, Tolomei, has made a study of the souring of milk by thunder storms, and concludes that this rather annoying phenomena of the dairy and household is explicable on the ground of the production of ozone during such storms. It may not act directly upon the milk to sour it, he thinks, for he prefers not to ignore, or discard, the prevailing opinion that the change is due to the presence of the bacterium-ferment and is allied to other fermentations. He assumes that in the presence of ozone, when it comes into contact with the upper surface of the milk—in the form of a layer superimposed on it, without agitation—the bacterium finds its most favorable conditions of propagation. Some experiments made by Tolomei go to show that ozone, when electrically generated without detonation, effects the souring of milk more rapidly than when its liberation is