Show VITRIFIED BRICK FOR ROADS I 1 department of agriculture issues bulletin on an advantages obtained in using this material the united states department depart tent ot og agriculture has recently issued as bulletin iff 23 of the new depart mental series a contribution from the ofelea ot dr the public roads and vitrified fied brackna brac kaa kas a paving material for coti country roads brick roads have tour our distinct ad adt adi t yan vantages durability easy trac traction tiong easo ease of oc maintenance and good appear ance the high first cost is a vantage the mite materials rials used and process of manufacture are described as well as methods of testing the tha bricks racks the construction of brecto roads Is ot forth in detail and the various steps in the process are heusi pirate especial attention Is dl di erected to the importance of proper en gi supervision an appendix ix gives the method ton for inspecting and testing sting paving bride brick as recommended by the american society caeti tor for testing materials |