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---=:.vi'-",-. IList of Vessels…

North Dock.

South Dock

Prince of Wales Dock.

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INTRODUCTION OF PAPERHANGINBS.

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fCEENCE NOTES AND NEWS.

Ti^ CAUSE OF SLEEP.

"ELECTRIC STEEL" IN GERMANY.

MEASURING THE INFINITE

THE ORIGIN OF GUNPOWDER.,

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THE ORIGIN OF GUNPOWDER. The Chinese have long been credited with Gw invention of gunpowder, but Professor E. O. «0n Lippmann, of Halle, has collected evidenes to indicate that this is a mistake, and that the Arabians did not, as commonly stated, introduor gunpowder into Europe during the eighth and ninth centuries. Professor von Lippmann be- lieves that the manufacture of the first gun- powder was based _upon the "Fire-book" OI Graecus, which appeared in Constants nop £ » about the. middle of the thirteenth een- tdry. This was the source from which "Roge1 Baoon, Albertus Magnus, and Thomas Aquinas derived their knowledge of gunpowder. The flrst ue of gunpowder to drive projectiles is ascribed to a monk, BerCoId Schwarz, whose discovery was made accidentally while prep/wing the mis ture for medicinal purposes.

FACTS ABOUT BUILDING STONl.