TARVIA LEADS 
The most extensive and thorough inquiry into methods for the suppression of dust has been made 
by the authorities around Boston, which is an automol:)ile center, famous for its many miles of first- 
class macadam roads. Many dust laj^ers have been investigated and most of them have been tried, 
not on mere experimental strips, but on a large scale. The conclusion drawn from this elaborate 
study is shown in the great and steady extension of the use of Tarvia in comparison with the dwin- 
dling amounts of other dust layers now employed. More Tarvia was used on macadam around Boston 
during 1907 than all other materials put together, and in 1908 Tarvia has practically had a monopoly 
of the field. 
Before the Massachusetts Highway Association, Division Engineer Franklin C. Pillsbury, of the 
Massachusetts Highway Commission, announqed; ‘‘The Commission concludes that for the present, 
tarviating (or treating with prepared coal-tar) is the best method now known for protecting the sur- 
face of macadam roads.” 
Many other prominent road engineers, notably John R. Rablin, of the Metropolitan Park Com- 
mission, and Logan Waller Page, Director of the U. S. Office of Public Roads, have reported favor- 
ably on Tarvia. 
The recent government publications also favor this method of treatment, and the only book thus 
far written on dust suppression, “Road Preservation and Dust Suppression,” by W. P. Judson, gives 
preference to Tarvia. 
Tarvia is a prepared Coal Tar Pitch in liquid form. When painted over a macadam road it pene- 
trates the surface, reinforcing the binder and giving to the roadway a firm, dustless surface which will 
last an entire season. 
Booklet on request. 
Barrett Manufacturing Company 
New York 
Cincinnati 
Chicago 
Minneapolis 
Philadelphia 
Pittsburg 
