Popular Science Monfhlf/
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��Bacteria Cannot Live in the Light
IF we cover with black paper one-half of a petri dish (a small circular glass tray with c(Jver) in which bacteria are growing and then place the dish in a light warm place for a few days, the growth of bac- teria in the light part of the dish will be found to be checked, while growth con- tinues in the covered part. It is a matter of common knowl- edge that disease germs thrive where dirt and darkness exist and are killed by any long exposure to sunlight. Accord- ing to George W. Hunter's "Civic Biology" (American Book Company) this shows us the need of light in our homes, especially in our bedrooms.
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��This living emblem of the Marine Corps is formed of its bearers in their parade ground at Paris Island, S. C.
��Underfeed Pipe That Loads from the Bottom
THE accumulation of moisture laden tobacco in the bottom of the bowl of the pipe is unknown in a style that is fed from the bottom. When more tobacco is to be put into the pipe, the bottom is removed, the new tobacco inserted from below, and the bottom replaced; conse- quently no part remains for days to soak up moisture and juices. The removal of the bottom also facilitates the cleaning of the pipe.
Whether or not one would appreciate the aroma of tobacco that would permeate his clothes as a result of carrying around the dottle in his pipe between smokes, is another matter.
Those who usually accumulate a lot of moisture in their pipes when smoking will find this new f an- gled pipe boon.
f.cEl PUSHED TOIOPOFPIPE
FRESH TOBACCO
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��DAMPNESS CAOSES TOBACCO n TO BURN AWAY FROM VEKT
����DOUBLE AIR '"^'^fRESH TOBACCO IN THE BOTTOM TKJHT JOINT -^^H ™ f^O^CT IT FROM THE FIR£ y^^ AMD KEEP n CLEAN
BOnOM REMOVABLE FOR LOAOINQ
��Section and method of load- ing the bottom-filling pipe
��Two Thousand United States Marines Form Their Emblem
TWO thousand marines, quartered at the training station of the U. S. Marine Corps, at Paris Island, S. C, are shown in the accompanying picture grouped in such a way as to form the design of the service emblem of the Ma- rine Corps, a globe showing the western hemisphere, an American eagle perched on top and an anchor crossing it. It is well to remember the fact, that in the emblem North and South America are visible on the surface of the globe. Otherwise it would be rather difficult correctly to interpret the meaning of the dark spot within the circle representing the globe.
The novel grouping of masses for pictorial effect is not an easy matter and it must have required a great deal of patience to obtain the strikingly good effect shown by the photograph, which was taken on the pa- rade grounds of the training station.
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