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“ You conducted the work at the Highgate Archway road? — I did.
“ Will you explain to the Committee the expense of the cement composition which was laid on the foundation ? -- The expense of the cement delivered was 2s. a bushel ; it was mixed with eight times as much of washed gravel and sand.
“ What distance of ground would a bushel so made extend ? — Laying on the cement six yards
? wide and six inches in thickness, came to 10s. a running yard; but in this case part of the gravel got in taking up the old road, was used; if new gravel had been purchased, it would have cost from 12s. to 15s. : that included the forming the bed of the road, which was done with very great care. There were four drains formed longitudinally, and there were secondary drains running from those to the side channel drains, and those again to drains outside the footpaths, covered with brick, and they all communicated with each other, and discharged the water into proper outlets. On the prepared centre of six yards in width, after it had been properly levelled, the cement was laid on, mixing it first in a box, with water, gravel, and sand, in certain proportions : every cask of cement was tried before it was allowed to be used, and when we
found it set properly, in about fifteen minutes, we then used it.
“ Did it become hard in fifteen minutes ? Yes, so that we could stand upon it: in about four minutes after being laid, a triangular piece of wood, sheeted with iron, was indented into it, so as to leave a track or channel at every four inches for the broken stones to lie and fasten in.
“For grooves for the stones to bed in ? --Yes ;
· and this triangular indent had an inclination of full two inches from the centre to the sides ; so that if water came through the broken stones, it ran off the cemented mass into the longitudinal drains.
« The cement had that fall from the centre of the road ? — Yes, three inches from the centre to each side ; that was sufficient to allow the water that percolated through the broken stones to run off.
“ What time of year was this composition laid on the road ? — 200 yards was done in winter; all the rest in July, August, and September.
“ It has been on the road through the last winter? — There has been part of it on since June, 1828, nearly two years.
“Have you examined it to see what effect the weather has had on it? I exainined it frequently during the frost, almost every six
weeks, and I never came to town without examining it.
“In what state have you found it ?-Perfectly hard in every case.
“ Not injured by the frost nor the working of the carriages over it? - Not in the least: there was an injury of six feet square, but it originated from the side banks of the road coming down and bulging it up.
By under-pressure ? — Yes; only six feet square was injured.
“ At what rate of expense can a square yard be laid, six inches thick, of this composition ? In the neighbourhood of London it could be laid for about two shillings, according to the locality, per yard six inches thick.
“ Was it dearer at Highgate, at the Archway Road ?--About twopence dearer than it would in London.
“ How many yards wide was it laid ?—Six yards wide : the gravel that was found in the road was made use of for part of it; if it had to be purchased, it would have cost 2s. to 2s. 6d.
“ What state was the road in when it was given into your possession by the Company? – I think it was as bad a road as I ever saw; a coachman could hardly sit on the box when driving along it.
“ Was it in consequence of the surface being
so uneven ? _The surface was uneven in some places; it was not in ruts, but in holes several inches deep.
“What was the surface composed of ?—Principally clay, gravel, and sand.
“ No body of strong materials ?—They could not last on it; they were worn out: an immense quantity had been put on; there were 1200 cube yards of gravel put on annually. Shortly before we took possession of the road, they put about 8001. worth of granite on a small space; ; the directors said it was necessary to examine the quantity of granite in the road, that we might deduct it from the contractor's prices, as they had laid out 8001. in so short a time; I did in consequence examine it, and opened the road in various places, particularly where they told me it was on, and I could hardly find a stone of it.
" Were not some of the stones worn into a perfect round shape ?- Almost every one I found was as round as an egg.
“ What, in your opinion, was the cause of these materials wearing out so rapidly ?—From the rubbing against each other, and from the weakness of the surface, and the elasticity of the road; in all cases those round stones were at the bottom.
“ Was the road damp and wet ?—Very wet.
“ Had those stones worked themselves down below the furze and tin you say you had to remove?— They were resting on them, and they were quite elastic.
“ Can you state to the Committee how many tons of gravel and stone have been laid on the road since it has been put under the care of the Commissioners ? — Eight thousand one hundred and forty-six tons of gravel, and 3614 tons of granite.
“ Can you state the number of yards of drains that have been made ? — There have been four longitudinal drains made the whole length of the road, besides numerous cross drains, one at every thirty yards; and there have been intermediate small drains every ten yards under the cement; making in all, 12,803 yards.
“ What was the reason for making such an unusual quantity of drains ? — From the nature of
? the ground: it was cut through a clay soil, high banks on each side; and all the surface water that came from the slopes and Highgate Hill, came down and rested in the hollows of the subsoil.
“ You 'made use of the cement because you could get no stone to make a pavement ? — That was one cause ; in that situation it was both better and cheaper than any stone.
“ Can you give the Committee any statement