File:Southern good roads (1911) (14591169230).jpg

Identifier: southerngoodroad1911varn (find matches)
Title: Southern good roads
Year: 1910 (1910s)
Authors: Varner, Henry B North Carolina Good Roads Association
Subjects: Roads Roads
Publisher: Lexington, N.C., Southern Good Roads Pub. Co
Contributing Library: State Library of North Carolina, Government & Heritage Library
Digitizing Sponsor: LYRASIS members and Sloan Foundation

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lity is not yet recorded so that a proper delinitrelation between th;^ values of the two methods can lieestablished. If, however, the object to be attained bythe work consists in having result a surface of cleanmacadam with the mosaic of the stones exposed andsimply their interstices filled with pitch, then a pitch that will later Lileed )iiay be objectionable, and the se-lection of a pitch that will neither bleed nor be brittle,as will as care to a\oid the use of it in excess, becomesilliper;il ive. In siii-li wMik als ) unilorniity of ap(ilication of thepitch and iiiiiformity of the pitched surface are mostimpiirt.-int. The exiierieiice of my d(-partnieiit is, howevei. that snfficient uniformity of application can behad by careful hand pouring. Such mechanical de\ices as lia\e been axailablc to us lune not been as sat-isfactory .IS hand work, • in general, as economical. Possibly the use of a propco pressure distributor mightin Slime cases be just died. .My experience also is that
Text Appearing After Image:
Scene on Grandfather Muunlain, J,(Kill Feet Above Sea Level,Yonahlossee Turnpike a, slight \;iri.iiice ii! the ajiplicat ion of the pitch nia\rt.inedy itself Ulliho sulise(;Uellt Iratlie ;iiid \veatlierIoiidit ions, and is not as seri ir,s a mattcr as a variancein the rec<iving surface. AVhere the stones of the mac,-iilam are to be them-seh-es exposed to traffic \ariatioii either in their uni-fin-mity of size or degrei- of compaction b<fore receiv-ing the pitch is a most serious nuitter. and one to bestrictl\ guarded against. Even when practically perfect screening of the topcour.se of stone is had, if the stones are snn-dl sized,their compact mn aftei rolling will vary considerablyand this \aio,il ion will be in inverse ratio to the jierfec-t ion of the sci-eening. I have found in my work that the variation in compaction of the stone decreases as tlie size of tlie stoneis increased, (irovided the difference in size of minimumand maximum is not too gi-eat, ami I considei- this l

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