Page:Popular Science Monthly Volume 92.djvu/881

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��Signaling System Is Employed in American Barrage

SOME details of how the American troops in France lay down a barrage before an attack is made by infantry are related by Major-Gen- eral Charles M. Clement, U.S.A.. who has returned from an inspec- tion trip to the front. A somewhat elaborate system of signaling is employed in connection with the barrage. This system is changed daily in order to frustrate the efforts of spies. The width of the barrage varies, and the fire is made inten- sive or light, depending on whether the men move backward or forward.

���This Submarine Raises Money Instead of Killing

THIS is the story of a submarine that invaded Scarborough, England, penetrating the very heart of the city without causing the loss of a single life. Furthermore, it was the means of helping to raise $500,000.

It was at first planned to have an under- sea craft anchor in the harbor in order to spur persons to give to the fund. This idea being found imprac^^ical, a street- car submarine bank was built. The actual work consisted in transforming the vehicle into a submarine on wheels. The mem- bers of the crew shown in the accom- panying illustration are Scarborough "sea scouts," each of whom, has been on vessels torpedoed by German submarines.

��The cave probably marks the place where a boulder dropped out of the surrounding snow

Nature Carves a Queer Snow-Cave in the California Sierras

THE accompanying picture is a June snow-scene in the high sierras of Cali- fornia. During the progress of a govern- ment survey the engineers found the peculiar cave formation in the end of a bank of snow which was rapidly melting away under the rays of the sun. It is not known how the cave was formed, but it is believed that it contained a big boulder which, when it became warmer, dropped out of the crust of snow enclosing it and rolled down the mountain side.

���This submarine took money instead of lives when it in- vaded Scarborough, England, to aid in raising $500,000

��Forts Built by Vauban Are All That Remain of Ypres

'^pHE only things left JL standing in Ypres after the German attacks are the forts built by Vauban early in the seventeenth century. This was one of the com- ments made by Major-Gen- eral Charles M. Clement, U. S. A., regarding condi- tions that attracted his at- tention on the firing line in France. He relates that in these damp forts two British commanders lived during months of warfare. It is queer that a seventeenth- century fort should survive a twentieth-century bom- bardment.

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