ROAD IN JACKSON PARK, CHICAGO, MADE DUSTLESS WITH "TARVIA A” 
The Best Known Dust-Layer 
In 1908, 4,000,000 square yards of macadam road were treated with Tarvia for 
the prevention (not merely suppression) of dust. Our largest markets for Tarvia are the 
localities where this treatment has been thoroughly tested. 
The U. S. Department of Agriculture through its Office of Public Roads has pub- 
lished an important review of all the dust- laying propositions, written by Provost 
Hubbard. The material which he most commends is a' certain refined tar of a heavy 
pitchy nature — which is an exact description of “Tarvia A.” Where considerations 
of cost rather than ultimate economy must dominate, his recommendations include a 
description of “Tarvia B.” 
The stone particles in a macadam road cemented together by the Tarvia treat- 
ment do not tear. loose under automobile tire suction, and the concrete-like surface 
sheds water and endures under the most difficult conditions (on Chicago parkways, 
for instance), for at least a whole season. Its cost is less than water sprinkling, and 
a clean , dustless surface is always assured by a single annual treatment. 
Booklet on request. 
Barrett Manufacturing Company 
New York 
Cincinnati 
Chicago 
Minneapolis 
Philadelphia 
Pittsburg 
Boston 
St. Louis 
Kansas City New Orleans 
Cleveland 
London, Eng. 
' V A'. TW 
