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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.,

FACTS ABOUT BUILDING STONl.

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FACTS ABOUT BUILDING STONl. Almost everybody knows the rule of the masona that stone used in building should be so placed that it will lie as it lay in ite natural bed when quarried. But Mr. Francis Wv Hoyt, is the Engineering News, says that this familial rule is not always to be depended upon, and needs in many cases to be supplemented with ether precaution*. There are three planee o! fracture known to quarrymen. The rift" is the direction in which the stone splits most easily: the "grain" that which is next easiest; the head" that which offers the greatest re sifitance. In a paving-block the two sides repre> sent the rift fracture the top and bottom the 'u grain, and the ends the head. PHIF. in a tne natural bed is sometimes considerably alined to thp plane. of the r; r t; hence the ina perfection of the ri*^ for plaoihg tk§ itooe in buildi