. The literary digest. schools in which aviatorswill be taught how to use theparachute. . The untrainedaviator will probably be so crazedby the fear of the fate that is im-pending that he will never thinkof using the one possibility ofescape. After all, aviators are taughtat present only to fly, and not to save themselves in an ex-tremity. For that reason, Mr. Calthiops suggestion thatparachuting as well as flying be taught seems to us eminentlysane. HOLIDAYS TO RELIEVE INTELLECTUALINDIGESTION T ^HAT THE HOLIDAY has its place in the proceduresof preventive medicine is editorially asserted by T
. The literary digest. schools in which aviatorswill be taught how to use theparachute. . The untrainedaviator will probably be so crazedby the fear of the fate that is im-pending that he will never thinkof using the one possibility ofescape. After all, aviators are taughtat present only to fly, and not to save themselves in an ex-tremity. For that reason, Mr. Calthiops suggestion thatparachuting as well as flying be taught seems to us eminentlysane. HOLIDAYS TO RELIEVE INTELLECTUALINDIGESTION T ^HAT THE HOLIDAY has its place in the proceduresof preventive medicine is editorially asserted by TheJournal of the American Medical Association (Chicago,March 1). The concentration of effort and the speeding up ofschedules due to the war, with the assertion of some efficiencyexperts that such concentration should become standard in thefuture, lead the editor to protest against what he terms thenew militarized procedures. More than one of those, he says,who have observed the actual working-out of these plans in. A POWER MAP OF THE UNITED STATES —The ac-companying map of the United States representing the sourcesof all primary power in the country, including water, steam,and gas, was prepared by Chief Engineer O. C. Merrill, of theUnited States Forest Service. The Electrical World (New York,March 1), from which we reproduce the map, adds a word ofexplanation: Primary power, which consists of the installed capacityof water-wheels, steam-engines, and gas-engines in commer-cial and municipal central stations, street, and electric railwaysand manufacturing plants, has been estimated for 1918 byassuming a rate of increase in each State from 1912 to 1918corresponding to the rate of increase for such State from 1902to 1912 The figures do not include horse-power of locomotives. The preponderance of power in the northeastern States isvery noticeable, especially when we define these as the Stateseast of the Mississippi and north of the Ohio. A map showingundeveloped power would make
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