Preserves Roads 
^ Prevents Dust 
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LAKE SHORE DRIVE, CHICAGO, CONSTRUCTED WITH “TARVIA X” 
ADDING TO THE LIFE OF MACADAM 
Tarvia is to the fine stone of a macadam road exactly what cement is to concrete. It 
is a powerful binder, filling the voids while fluid and then solidifying and forming a tough, 
adhesive matrix about the stone. The adhesion of Tarvia to stone is perfect. When the 
fine screenings that constitute a macadam surface are agglomerated with Tarvia, the suc- 
tion of automobile wheels will not tear them loose in the form of dust. The life of the 
roadway is thereby greatly prolonged and the dust nuisance abated. 
Some such radical reinforcement of macadam road surface is an absolute necessity to- 
day, as every road engineer has learned by costly experience, and Tarvia is the only answer 
thus far proposed and extensively tried out. 
Without Tarvia the top surface of ordinary macadam will not last a year under auto- 
mobile travel, and the dust nuisance is intolerable. The swdft wheels suck the fine powder 
out of the roads and scatter it far and wide, stripping the lower courses of stone of their 
cushion, after which frost and the percolation of water quickly ravel the road. Continual 
resurfacing is so expensive that many road authorities have had to let the highways remain 
without surfacing, merely contenting themselves with repairing the worst breaks. 
Tarvia makes macadam able to withstand automobile travel, makes the roadway 
dustless, and costs less than the expense of maintaining a road which has not been tar- 
viated. 
Booklets on request. 
Barrett Manufacturing Company 
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