. The Ontario high school physics. ^, the yard and the metre. The yard is said to have represented, originally, the lengthof the arm of King Henry I., but such a definition is not byany means accurate enough for present-day requirements. It THE METRE. FiQ. 1.—Bronze yard, 38 in. long, 1 in. sq. in , a are small wells in bar, sunk to mid-depth. is now defined as the distance between the centres of twotransverse lines ruled on two gold pings in a bronze bar,which is preserved in London, England, in the StandardsOffice of the Board of Trade of Great Britain. The bronze bar is 38 inches l
. The Ontario high school physics. ^, the yard and the metre. The yard is said to have represented, originally, the lengthof the arm of King Henry I., but such a definition is not byany means accurate enough for present-day requirements. It THE METRE. FiQ. 1.—Bronze yard, 38 in. long, 1 in. sq. in , a are small wells in bar, sunk to mid-depth. is now defined as the distance between the centres of twotransverse lines ruled on two gold pings in a bronze bar,which is preserved in London, England, in the StandardsOffice of the Board of Trade of Great Britain. The bronze bar is 38 inches long and has a cross-section oneinch square (Fig. 1). At CrossSecUona, a, wells are sunk to themid-depth of the bar, andat the bottom of each wellis the gold plug or pin,about yV inch in diameter,on which the line definingthe yard is engraved. The other units of length in ordinary use, such as the inch,the foot, the rod, the mile, are derived from the yard, thoughthe relations between them are not always simple. 5. The Metre. The metre came into existence through aneffort made in France, at the end of the 18tli century, toreplace by one standard the many and confusing standards oflength prevailing throughout the country. It was decidedthat th
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Keywords: ., bookcentury1900, bookdecade1910, bookpublishe, booksubjectphysics
