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THE WELL-BOUNDED SURFACE OF A TARVIATED ROAD PHOTOGRAPHED AT CLOSE RANGE 
A Foreign Opinion 
for September 22nd. Other leading engineers 
and the engineers of France support this opinion 
as did also the International Road Congress at 
Brussels. 
The above reference to "tar" does not mean 
ordinary crude tar from the gas works, but pre- 
sumes that the tar has been properly prepared for 
road use. 
Tarvia is the only tar that has been widely 
used on American roads and the only one that 
has become standard in engineering practice. 
Tarvia acts as a binder, filling all voids in the 
'stone and holding it firmly in a tough, water- 
proof, elastic matrix. 
‘‘Tarvia B" is applied cold for dust-laying pur- 
poses principally. ‘‘Tarvia A” is a heavier grade, 
recpiiring heating before use and is used in thor- 
ough surface work. "Tarvia X" is used in road 
construction. Booklet on request. 
‘‘That it is becoming a generally accepted 
opinion that tar in some form or other is des- 
tined to play an important part in the road con- 
struction of the future is undoubted. 
“Apart from its comparative dustlessness — the 
essential and most important characteristic in 
respect of which it holds an advantage over an 
ordinary macadam — it is now practically reduced 
to an axiom that a tar-bound macadam road has 
enormous advantages over an ordinary macadam 
road in the following respects: 
“Economy of maintenance, through its ability 
to better withstand agents of road destruction, 
both tractive and climatic; economy of scaveng- 
ing and watering; a flatter permissible camber; 
noiselessness and hygienic advantages.” 
Thus writes F. 'Walker Smith, City Engineer of 
Edinburgh, Scotland, in the Engineering News 
Kansas City Cleveland 
jattle London, Eng. 
New York 
Cincinnati 
Chicago 
Minneapolis 
Philadelphia 
Pittsburg 
Boston St. Louis 
^ New Orleans 
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