The Bridgeport times and evening farmer., 1919-05-09

spreading and rolling Is approximately the same for a finch pavement for a 2-inch pavement. There are difficulties, however, with a To- peNa pavement, which make the cost of these items approximately higher than for 2-inch pave ment
 The greatest difficulty in preparing an exact estimate of the cost of bitulthic in determining what bItulithtc is The specifications furnished by warren Brothers company although voluminous, give very little information. difficult to imagine piece of technical literature of an equal number of words which gives little essential formation Instead of giving the physical charac- teristics of the materials of bituhic is com Poseu u1e specifications provide for certain vague results This uncertainty of the specifications ef- thorites.
 The report of the Street Department for 1903 gives the composition of bitulthic follows:
 T is laid inches deep, inches of which is composed of No. 1 crushed. stone, well rolled and treated with two layers of bituninous cement. The other inches, or wearing surface, is composed O crushed stone, varying in size from inches to a fine dust and heated and mixed with bituminous cement and rolled with a steam roller
 The binding material at that time appears to nave been a coal tar compound Later find the and the size the stone has grown smaller no Z-lnch stone being included Still later the crush crete foundation is substituted
 At the present time the surfacng mixture seems to contain above 3-4 of an inch and the binding material is some grade of asphalt. the ture being usually laid a single layer inches thick although the bitulthc pavement laid for the Port Directors appears have been laid as a two layer pavement, the lower binder course being of conpara lively large stone and the yvearin, snrfsca being finer material similar to Topeka.
 The present type of pavement appears to have few, if elements similar to the type laid in 19O3 although the pavement Dartmouth street, near Beacon street, which assiduously nursed during the past years still point ed out as an example of the wearing qualities of bitulithic pavement There seems good req son to believe that on account of the elasticity or it's foundation the type ot pavement laid 1903 has better wearing qualities than type now be- ing used with a concrete base When laid on q foundation of old macadam there should de- cided difference.
 Thei following detailed estimate has been pre- Columbia in givene. The result confirms correctness of the figures given in the previous report pave ment inches in thickness:
 Per Square
 Yard Asphalt. 1882 pounds square yard !.. 1882 cents Stone, 1435S pounds square yard 10.77 cents Sand and filler, 68.S0 pounds yard Hauling ....................... 1900 cents I19i InyIts t 6OO @ cents Plant investment ...................- 200
 The figures in the previous estimate show labor. materials and plant investment only They into account the great expense to War Brothers Company account of office, print ing. advertising canvassing, expenses enter tainments legal services. bond Laboratory"
 The only uncertainty in the above figures is a regards the prices for hauling and plant The figure for hauling is estimated 6 miles from the plant The figure fer rIant invest 1nent of with the amount of work done by the plant Whatever may the cost of hIt.,!!th- ic o Warren Brothers Company, there no ap- parent necessity of the cost exceeding the above figures
 | figures given are greatly in error the Warren Brothers Company easily disprove them by submitting schedule showing the actual amounts of each closs material used per square yard their bulithic, together the receipted bills showing the cost of such materials Such a method would be more convincing than a simple denial o correctness of estimates.
 (Continued Tomorrow