MACADAMISED ROADS.
221locks. There was now no detention, whereas formerly, there were frequently fifteen, or twenty boats waiting their turn.In the case of a very small lift, such as could be overcome by one lock, the advantage would doubtless be in favour of pumping, since the expense of raising water was almost in the proportion of the height to which it required to be pumped; whilst in the case of an inclined plane, the expense of construction was the same for a small as for a great height, with the exception of the diminished length of the rails and ropes, and the working expenses were proportionably much greater on a short incline than on a long one. January 31, 1854. JAMES SIMPSON, President, in the Chair. No. 903.--" On Macadamised Roads, for the Streets of Towns." 1 By JOHN PIGOTT SXITH, Assoc. Inst. C.E.THERE is a very prevalent and natural feeling, against the employment of broken stone, for the surface of streets, because, under the usual construction and management, much inconvenience arises from the dirt and dust thus occasioned, and also because the maintenance and repairs are expensive, and the draught of vehicles is, comparatively, very heavy. It may, however, be shown, from long-continued and extensive experience, that these conditions are not, necessarily, entailed by the use of such roads, and that the inconveniences may be economically and almost completely avoided.The Author having had, for many years, under his immediate charge, 150 miles of street-roads, and also the general superintendence of 50 miles of turnpike roads, has naturally devoted much time to the consideration of the subject, and the result of this extensive and continued experience has confirmed the opinion, that broken stone, or macadamised roads, if properly constructed and managed,-by which is meant, having themThe discussion on this Paper extended over portions of two evenings, but an abstract of the whole is given consecutively.
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