Show 1 I 1 HI top dressing Dreth suing lii limestone was ivis formerly rogar regarded ded a no aine tie of C the best rocks for top dres dressing rua and it lias has been exclusively used for such h purposes it has however proved v very uey unsatisfactory factory in the long run anil and in many parts of the country limestone macadamized roads are being taken up and reconstructed of more satisfactory materials the rock wears easily into au an impalpable powders powder n lien dry and forms forma a sticky paste when v vi ct hard limestone makes an excellent I 1 roadbed but should never be used for surface dressing there is a tempts tion to use limestone for such purposes because they are arc easily broken and pack rea readily dilyou on their friability but they wear out with equal readiness and soon require repairing john C branner Bra oner state ae arkansas |