Daily press. [volume] (Newport News, Va.) 1896-current, 1908-10-14
CONTRIBUTION TO
LITERATURE ON ROADS
"Dust Preventions," issusd a. . su''
Ietin by Y. 8. Bureau, = Valuable
Work.

"Dust Preyentives" oy Provost Hub
bard issued as Bulletin No. "a. U. 5.
ONCE of Public Roads, Is the latest
contribution to literature on road con-
struction and maintenance. MIR. Hub
bald's paper has been prepared 10
nc It the growing demand by road en-
CHEERS for specific Information Oh
tue important subject Of dust pre-
veution. He has made research VI
all literature used by the ONCE OF
! rUbiic roads Interest has been re-
GENTLY reawakened in the problem OF
the prevention Of dust on country
, Highways. the we'll nigh universal use
OF the automobile being responsiDle
fer the additional study and expert
merts, Road engineers are now
arreed that the automobile when moV-
ing ct a high speed Is destructive 10
macadam roads. the broad SOFT tires
, lifting the rock dust and scattering
It over adjacent fields. A road robnea
Of this Hne surface binding material
retrogrades rapidly. That Indictment
low hes against the modern motor
car but on the other hand the intro
Iuct,on of the machine has done much
! l., awaken an interest, not merely IN
dust prevention. but in the entire SUI
, ject OF road Improvement. Therem
the automobile is entitled to credit.
1t IL superfluous to add that clouds
, o. dust are annoying, not only to the
users Of the highways. but TO the
residents whose properly borders upon
them, and that they anect public
health and depreciato he value OF
property. .
| MIR. Hubbard, in his discussion OF
methods OF overcoming tlis condition
divides the problem .nio two parts.
first by applying materials that will
hold the dust down, aud second. by
adopting a form Of road construction
that will reduce dust formation and
the wear Of roads to minimum.
These he says may &c attained by
f"temporary" and by permanent bind
ers-those under the Temporary" cIas-
sification being materials which must
be frequently applied. the "perman-
lent" ones being the heavier materials
which through one application main
tain the road surface IN a dustless con-
dition for a season.
The author describes the manufac-
lture and properties Of tar. pointing
out the differences between tar from
coke ovens. from gas plants. refined
coal tar, and water-gas tar. A chapter
on the application OF tars follows ana
brings out the fact that the painting
Of road surfaces win tar was con-
sideered in France as early as 1867. al
though the work was not begun In
earnest until 1902. The chapter con-
ltains clear directions FOR applying the
material to the road, both used as a
palliative and for use In permanent
reconstruction. Much data Is given as
to cost and quantities OF materials,
and examples are c.ted Of successful
roads built by the aid Of various tars.
After the consideration o! tars, the
author deals with the CLASSIFICATION
and properties OF oils and gives the
location Of all the producing fields
in the United States. He describes
the method Of refining oil and the
charter Of the residuum. and draws
comparisons between crude Oil and
iby products of the refined OIL
A chapter dealing with water and
salt solution including calcium chic
ride follows. and the portion Of the
bulletin relating TO materials isrmi-
mates with a chapter on temporary
tar and oil finders, emulsion and sim'-
ar preparations
Mr. Hubbard concludes his treatise
by calling attention TO the importance
y. careful selection OF Gust prcventa-
it:yes making valuable suggestions !or
til" choice Of materials for trestins
country roads. suburban and park
rcads respectively. He gives an eH.
hsus:ice explanation Of the methods
70 examination. ard outiinsS f~nfa-
tive specifications for the use Of dust
peevcntatives. The bulletin should do
much toward directing cNpsrimeniai
work in This important ncid along
proper lines.