Daily globe., 1878-04-21


and are to-day perfectly sound and in fact
are harder than the wood in it's natural state
ever becomes.
Do not understand me that all pavements
here treated by the Thilmany process have
proved a success, for they have not, but in
all cases Of failure it has been traced to the
use of unsound timber. From my expert
ence and observation and for economy of
process think the Thilmany the best wood
preserving process in use.
During the eight years was city engineer
I gave great deal of time and study in ex-
amining and experimenting on the different
wood preserving processes. and for the last
three years have been watching the results
of those experiments, and have come to the
conclusion before stated
The following is from B. F. Morse, city
civil engineer of Cleveland.
The date is February 16, 1873.
There are three kinds Of pavement laid in
Cleveland, the most durable and cheapest is
Medina New York sand stone. brought here
by canal and lake. This kind of stone has
been used here more or less for the last fif
teen years. There were paved here last year
two streets with this stone.
There has also been laid here during the
last five years several miles of wood pave
ment treated with the Thllnany preserving
process: it will take four OF five years more
| time to test it thoroughly as to its dura-
| biIity.
I We have also paved several streets with
Abbots concrete, and have covered old Nicol-
son pavement with it. The kind of pave
ment has been down from two to three
years, some of it has done very we'll, while
other parts have been repaired.
| Wood and ccpcrata DavameDto ara luyu-
ries that but few streets can afford in the
long run, yet they will pay in some instan
| ccs.
We find by experience here that where
two streets run out of the city nearly paral-
lei, one of which is paved with wood or con-
crete and the other with stone, that people
almost universally shun the stone ond 90 out
of their way to drive on the smooth pave
ment.
In some such cases it may pay to lay pat
ent pavements as the increased traffic and
consequent increase of business, during a
number Of years would enhance the value of
the property to pay the difference in the cost
and frequent renewal. But generally good
Medina stone pavement is the cheapest and
will last twenty five or thirty years or more
If put down properly.
| WASHINGTON.
The information here following is from
II. L. Hoxie, Lieutenant Of Engineers, U. s
A. Engineer of the District of Columbia.
WASHINGTON, Feb. 4, 1S78.-The expert
ence of this city with wood pavements has
shown that the round block cedar is more
durable than any other. 1t has been lail
with sand and gravel foundation, interstices
| 11,J II, IL IL
also been laid with foundation of abou
two inches in depth of coal tar concrete, in
terstices being filed with the same material
The latter method seems to give the better
pavement, but neither affords sufncien
foundation to prevent unequal depressions.
These pavements are wearing out as antic
lpated in my annual report of 1873.
1t is now proposed to use the best of thes
pavements as foundation for wearing
surface of some variety of bituminous pave
ment, to be put on about two inches in thick
ness.
The following extract is from the repor
of Lieutenant Hoxie, referred to in his let
ter. The report is dated District of Colum
bia. Nov. 80, 1876.
''In order to thoroughly repair the woode1
pavements, it was necessary to get rid o
, them. To this end. it was decided to talk
up all the defective work, to select the SCUM,
blocks and relay them, and to put down upo1
] the remaining space q pavement of ston
, blocks, or of concrete, whose cost should no
exceed that of the wood pavement. Wher
the original pavement was not too far gone
, patching was resorted to, but where tn
decay was universal, the entire pavement wa
taken up. In order to avoid the inter
mingling of wood with concrete, or stone
III alternate patches, q section OF the oil
pavement in the worst condition, was sc
lected for removal, to furnish the requisit
number of sound blocks for repairing tn
: balance Of the work, and to be replaced by
, section of new materials. Further on in tn
same report, after quoting from the repol
OF Committee of the Board of Health
condemning the wooden pavements whic
extract concludes with the following recon
!, mendation: .'s.rhat the Health Officer be il
= structed to examine wood pavements fro1
:, time to time, and report their sanitary cor
dition, with view to condemn, as quick
as necessary, those that, in the opinion {
the Board, may be considered injurious
y health Lieut.. Hoxsie closes his report @
payements, as follows:
e "lt would be unjust. however, to app
+ this general condemnation Of the woode
pavements without discrimination. I'll
round block cedar pavement, untreated, h,
been laid at less than half the cost of Il
/ patent block payements, and is still in ia
q condition. It has had in general the adva1
IS tage of being laid upon good slope,s whit
le threw off the water rapidly, and upon stree
st not used for heavy travel. The shape
the block, uncut except transversely to Il
d fibre, and exposing the pores only in vert
t, cal direction, may assist in prolonging Il
/ life Of this excellent wood. Where tn
ID pavement is out of order the sapwood b
> given way under travel while the heart +
Ia manned comparatively firm, and the bloc
l. have worn into conical shape. This seen
y to indicate the manner in which it will ul
mately wear out, but the present conditie
r, of most of it argues pretty long life
i'd spared hard usage. None of this paveme
" has yet been repaired by the commissioner
as The Flanagan pavement, made of roul
'ti blocks of any sound wood, laid upon a fou
as dation of bituminous concrete and food
ue with the same, has been put down upon sol
of the worst drained streets in the distr
as and is all in rood condition at nresant n,