¥o. 216.] 241 



Then the foundation should be of broken stone, cemented together 

 with hydraulic limej mixed with sand in a state to set, and make a 

 solid mass impervious to water; over this body at the sides should 

 be placed deep curb stones, and beside them gutters of solid stones 

 to carry off water. The pavement of Mr. Russ, should then be 

 placed over the concrete, solid substance in the street and between 

 the stones, liquid cement sl\^ould be poured to prevent the introduc- 

 tion of water, and thus prevent heaving by frost. 



In the city of Marseilles, I saw a costly pavement vastly superior 

 to the above, and which will no doubt last as long as the " Appian 

 way," it was all of cut stone, and bound together in squares by strong 

 curb and gutter stones, with binders in the middle of the street, and 

 crossing every twelve feet; thus making a work of such beauty and 

 utility as to strike the traveller with surprise on examining it; but 

 here, we must work with less expense, and I think if Broadway 

 should be paved upon the above plan, it would prove of more advan- 

 tage than any other yet projected, and no doubt Mr. Russ can carry 

 out the matter in a way to ensure a durable pavement. There is one 

 obstacle in the way of having Broadway always in a good state for 

 carriages, not hitherto spoken of which is the laying down, taking 

 up, and repairing of gas and water pipes in the streets; these should 

 have been so laid as not to make it necessary to be continually taking 

 up the pavement, digging out sand and filling up again; thereby 

 keeping the noble thoroughfare always in a state of confusion. This 

 is a matter of moment, and should claim not only the attention of 

 the common council, but of the gas companies and the croton water 

 department. 



With high respect, 



I am, your obed't servant, 



CHAS. HENRY HALL. 



P. S. The committee found at the Palisades, hard stone suitable 

 for the upper strata of roads, in great quantity. 



[Am. Inst.] 



