Show ROAD destroyers uses m of tb the tort corces chith to im par A roadbed may way uffer suffer disruption by shrinkage of the cn bgrace it ha has awu determined ieter rained experimentally that clay shrinks one fifth of it IN bulk in excessively dry weather aad and increases to a cor car tig degree when wet end and that tili clon ands a and gravels undergo DO iu in volume from this it follow follows ilia bat 1 when a wiy jamee over it clay bed which may become desiccated ous on results aro are likely to follow partick barly at a point where the clay abate abuts a send substratum which id is unaffected by weather changes the gradual destruction destruct fon cf of a roadbed by the ordinary ot of friction and end impact ie is always to be expected A t H ril 1 SH tt tn t VIS n lh A V bulletti Bullet bi and the rate wear would seem to depend directly pon the hardnen of the mad atone owed used I 1 itri ital construction and yet 0 o many facton clan lave to be taken into consideration ii IL choosing a road read metal that it li 19 I 1 I 1 question ot of hardness haid neu sr important ai as it may be when combined with other qualities lierly ia bot of 0 greatest quartz the hardt 1 t ot of oar car mineral minerals need used alone doc does not make a desirable deil rable road tone stone aa a its ir doit dust I 1 ll 11 lack ing ilig in cementing auver it ba ha a low gravity and Is 1 very brittle tien we should wk to avoid in it lecile road material antho on abo ether band hand ricks as toft j ai lime stones and slates are quickly ground to powder and are ate rapidly canted away by water vater and wind action nera of importance in lending to resist the abrasive abra elTe effect of whet wahecia and the fet fett ct c animals but promotes crum bling noder under the impact ot of blow blows there by delivered when the way paws through o 0 wood woods or when large arm occur along the roadside the integrity of the foundation may way 1 be disturbed ly 11 the force rt vt growing roote la in this connection it will be well tor for haing having barge tt of beautifying our cot to plant troea treat the root roots of which bead downward tether than |