The weekly register. [volume] (Point Pleasant, Va. [W. Va.]) 1862-1909, 1908-07-08

present surface like asphalt pave
ment is Just in It's infancy In southern
california, snys the Los Angeles
Times. In Pasadena there arc num-
Der OF streets OF this kind, notably
Madison avenue, prepared at cost OF
10 cents per square foot and with
depth of seven inches Of foundation
Blocks of this street arc scarcely dis
tinguishable from asphalt paving
There are others similar, but some arc
not equal to this AT the same time
they are superior to those prepared In
tho old way.
1Tfic new method of macadamlzing
and ollIng as laid down in set of
specifications used for n number OF
streets may be outlined substantially
MS follows: For the foundation grading
Is done by the removal of all earth,
stone, loose rock, cement, shale, hard
pan, etc, to depth of seven inches
below the intended finished surface
and to farther depth OF two feet be-
low the subgrade whenever mud, sand
or other soil material is encountered.
the space to be rcfilled with good
Garth or gravel. The whole Is rolled
with roller of not less than twelve
tons in weight until the surface is I'M
yielding, all dcprcsslons made by the
roller being filled up and rolled again.
All portions that cannot DO reached by
tho roller must be tamped solid, and
tho rolling must not be done In wet
weather or when the ground is soft
and muddy. This subgrade must be
checked by the street superintendent
before proceeding with work.
On this grade bottom course OF
mncndam Is laid consisting of stone
not exceeding three inches in diameter
and not less than one and half inch
cs. This layer Will be five inches In
thickness and is rolled with a twelve
ton steam roller until the stone ceases
10 sink under tho roller or to creep In
front of 1t.
A top course of stone between three
fourths of an Inch and an inch and n
anlf in diameter will cover this to n
depth OF two inches and will be rolled
as before after first coating OF oil
Rone-half gallon to the square Yard
Is applied evenly so rs to saturate the
entire top layer. Then NIL voids are
filled In with rock screenings OF the
same material as the macadam not eX-
reeding threoquarters OF an Inch In
diameter, with n top dressing OF the
same material laid to the depth of half
an inch, after which there is given n
second coating of oil TO the same
amount as before and the whole rolled
and tamped until no evidence of the oil
remains on the surface except as
shown In the color of the screenings
Sharp sand is to be sprinklcd wherever
any oil remains TO absorb 1t. These
specifications provide that oil shall be
of 10 to II gravity. with so per cent
asphaltum Mt so penetration and with
not more than per cent water.
The Pacific Electric and Los Angeles
unterurbnn railways are using this
method on their rights of way in Pasa-
dena. Long Beach and one or two
other points 1t ts said to be better
than tho use Of asphalt as It gives
with the pressure of the rails under
weight of cars and can 10 taken up
pnd replaced without difficulty. 1t docs
not crack and lump. as does the as.
phnlt. 1t Is hard TO tell 1t from the
latter, sometimes impossible, for the
average person. In Long Beach the
result has been very good.