Page:Popular Science Monthly Volume 92.djvu/776

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��Popular Science Monthly

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��Where tiiL ■.'..<y~ '■■ '■'' I'ttle raindrops part — westward toward the Pacific, and eastward toward the Atlantic

��Marking a Point on the Continental Dividing Range

THE big sign shown in the illustration was erected by the State of New Mexico to mark an in- teresting point of the continental divide. It stands near Corona, N. M., on the trans- continental highway, and attracts much at- tention from tourists traveling over that road. It marks a point of the continental wa- ter shed, and its posi- tion is such that the rainwater which falls on the west side of the sign flows toward the Pacific Ocean, while the rainwater falling east of the sign eventu- ally reaches the Atlantic. Of course, there are in- numerable such points along the continental divide, but only in a few sporadic cases are they marked for the benefit of tourists. If more points of interest were marked in this way it would add much to the pleasure of travel.

����One Man Handles Col- lapsible Form

REMARKABLY clever device has been placed on the market and promises to revolutionize the construc- tion of concrete box culverts. It is a collapsible metal framework in sections, which forms the support of the wooden casing for the con- crete. The set of forms for the construction of a cul- vert, thirty feet long, consists of four sections or units, which are entirely independ- ent of one another. The frame, which is shown in the accompanying illustrations, is of iron, and adjustable laterally and also vertically. Two sizes are adaptable to thirty-nine different culvert openings. One man can set up and remove the forms. The mechanism is exceedingly simple and easily operated. The units are set up, the casing of matched boards placed over the framework and the concrete is filled in around the casing. Af- ter the concrete has hardened, a pull at the cross-bar causes the top supports to fold up, while a pull at the center bar draws in the side sills. This de- prives the wooden cas- ing of its support and the boards separate from the concrete and can be removed, clean, unin- jured and ready for an- other job. Trials of the device have shown that it effects a great saving in every way.

��This new collapsible, sectional concrete form can be handled by one man with perfect ease

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