Northern Wisconsin advertiser. [volume] (Wabeno, Wis.) 1898-1925, 1901-04-04

three inches of hand-broken stone to
pass through 21A inch ring, then
two-inch layer of machine broken
stone the whole smoothed off with q
! hand roller and after top dressing is
applied thoroughly rolled with
steam roller. OnthIs layer of fine
gravel and quarry clippings, mixed
in equal proportions, three-quarter
inches thick, must be placed, and well
rolled so as to fill all intefstices. Be
fore finishing, dressing of stone
screenings for the purpose of coloring
should be scattel Ell broadcast to be
worked in ny the traffic. All layers,
including the coloring layer, must be
thoroughly compacted by rolling.
| "The stone TO be tarred must if
moist be heated on an iron floor,
under which are fiues from fire,
until the moisture is driven out. The
material in its heated state is then
| thoroughly mixed with sufficient
quantity of tar The broken stone in
warm weather may be sun dried but
in all cases the finer course must be
artificially dried. At the same time
care must be taken not to get this
material too hot. The tar should be
boiled in iron kettles holding 100
gallons. Eight gallons should be add
ed to each cubic yard of the coarser
material or more if required to com.
pletely cover the stone, and IL to Is
| IN hn Hrnn nf ctr
The tar must be pure coal tar free
from all foreign substances and con,
tanning not more than per cent of
water and shall contain not less than
Sc per cent pitch. The work must be
done in the summer months, and all
work must be suspended during wet
weather."
The roadways in these cities, says
Dr. Buckley, have not Scen in rse a
sufficient length of time for any one
to give definite information as to
their suitability for city pavements.
1t was also impossible for him to OBJ
tain information concerning the
probable cost of cleaning, repairing,
and sprinkling these pavements.
In Hamilton, Ontario, this pavement
cost about CSC. per square yard, the
same being based upon the coal tar
at 1915 per barrel, laid down in
Hamilton, and labor at 1Sc per hour.
City Engineer Wingate of that place
writes that he has ever reason to be-
lieve that the annual cost of repairs
would not exceed &c per square yard.
City Engineer Graydon of London,
| Ontario, writes that the pavement
which they have laid have cost $1.20
per square yard. He says the only
caution to be observed in laying this
pavement is to have an inspector see
that the specifications are carried out
to the letter. His remark that
eternal vigilance is the only way to
get good work." might be followed
with profit by some Wisconsin in
spectors of street work.
City Engineer Rust of Toronto
Ontario, says that the tar macadan
roadways which are being constructed
in that city are costing from $l.30 Il
$t.40 per square yard The tar
macadam streets constructed in that
city consist first, of layer of broken
stone inches In depth which is thor
, oughly wetted and rolled as for an
, ordinary macadam roadway. On tor
} of this is laid course of tarred stone
: inches in depth upon which is I
+ dressing of y inch of fine grant;
! clippings and gravel. which are alst
e mixed with tar, the whole being rolled
! with steam roller This construction
a is simple and should be carefully con
a sidered oy anyone contemplating
[ using tar-macadam as a pavement.
g In some sections of Wisconsin, con
: tinues Mr.. Buckley, there occur vas
e quantities of quartize and granite
, both of which have been considered
4 unsuitable for macadam pavements Oh
$ account of the difficulty experienced
d Ia packing the rock firmly on tn
( streets on which il has been used
e In number of important instance
. these deposits of quartzite and grant
5 occur in localities where other ma
I terial for street pavements are YER
r scarce He is inclined to believ
that the tar-maeadam pavement whicl
= has been tried in Canadian cities an,
i which has all the appearance of beini
! well adapted to the light traffic of Gel
5 tain sections of this state, could b.
4 used advantageously in many mmic
| palities where the expense of con
+ structing asphalt or brick pavement
is retarding the Improvement of tn,
( highways.
. Necedah for example, is situate,
0 in the midst of vast area of marsl
S and prairie land. from which oc
T casional hills Of sandstone and quartz
e lite rise to relieve the genera
n monotony of the landscape The APP
proaches to the city are. in som,
4 cases, over roads which are beds o
i sand for miles. The only ston,
S easily available for improving thes,
Y sandy stretches of road is the quartz
lite which occurs at Necedah in uu
e limited quantities almost within tn,
o city limits. For the city itself tn,
D quartzite might be used by crushinl
" and mixing with tar to form tar
. macadam pavement For the couptr,