as many as possible of its large, roundish and smooth stones broken by means of a hammer before the time of laying it on the road, and that an heavy iron roller, of from four to five feet diameter, and not less, might be advantageously used in the first settling down of this gravel; a small roller, such as I believe to have been tried in the neighbourhood of London, very heavily loaded on its top, might have a tendency to force the loose gravel before it so as not easily to be drawn or to mount on to the gravel driven before it without crushing the flints. I will add, I am of opinion, that a roller could not be beneficially used upon a road at any other times but after new coating it with gravel, or after a frost or the sticking of materials to the wheels may have loosened up the materials.
Do you consider that the present regulations in regard to exemptions of tolls to waggons with broad wheels, are justified by sound policy?—In my opinion, those exemptions have wholly originated in mistaken principles, and that no wheels wider than about six inches are now, in fact, used upon the roads, owing to the general and gross deceptions which the waggoners practise as to the breadth of surface that their wheels roll on; and that if by any more efficient regulations, the users of broad wheels were compelled to roll the breadths of surface, which the laws contemplate, all such wheels would be immediately disused, from the great additional force of draught which broad wheels occasion during the average state of all the roads.
Are you of opinion that any regulation by statute, for substituting cylindrical for conical wheels, would remedy that evil, or justify an exemption from toll?—As far as I have observed, there are no conical wheels in use: all the wheels are rounding or barrelled, and it is comparatively an immaterial circumstance whether they approach the form of a cone or a cylinder, while they remain so rounding or barrelled,
