Show SPIDER WEBS USED IN SURVEYING LEVELS I WASHINGTON D. D C C. July 22 Xo No No substitution for lor the spider web has yet been discovered in the manufacturing of ot surveying instruments It is used for tor forthe forthe the cross hairs that mark tho the exact center of ot the object lens In a surveyors surveyor's telescope The spiders are kept Ina large room in charge of ot the th tb t four ur I women The web as is as spun Is 15 wound on met vanes s whirled in the I II I f haft ha Hon at be e women I concerts |