revent the constantloss and trouble attending this natural sourceof decay.—North of Scotland Gazette. New Syphon.—We understand that a scien-tific gentleman of this town intends to bringbefore the savans, in August, an improvedsyphon, which will go far to remedy the com-paratively useless ancient… … In No. 67, page 165, ante, we gave an explan-ation of the mode adopted for striking anelliptic arch without the aid of the compass;we now give the same with regard to a seg-mental arch. The principle of drawing it issomewhat similar to the ellipse. Divide thebase into eighteen equal parts, then…
Design · Decoration and ornament · Art
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