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

Sample No is sample of Topeka Close examination will show that the operation of crushing has taken place in the bitulithic As the stones in the Topeka, however, smaller the effect is not apparent
 Sample No. 3 is a sample of sheet asphalt. The crushing effect is not apparent to the naked eye but under a microscope the same effect will be shown in the grains of sand composing the aggre- gate. The wear, however, is infinitestimal as compared with bitulithic and small compared Topeka.
 This process was well presented a paper read by MT. Francis P. Smith before the American So- ciety of Municipal Improvements at the 1915 con vention. This report may found page 120 of the proceedings Of t3at convention Partial quota uons from this paper were made by an engineer of the Paving Service before the City Council at meeting some weeks ago, the intent belng to dis credit Topeka paving material Unfortunately, for complete information of the Council the engineer did not quote statements more pertinent to the than those he did quote, particularly the summary, follows:
 in this class) suitable for light and medium traf-
 '~Topeka mixture suitable for light and med
 sheet asphalt suitable light, medium and heavy traffic"
 Fifth. Heavier machinery which expensive in first cost and in cost of operation is required for properly manufacturing and laying sheet asphalt or Topeka
 The weight of machinery required depends entirely capacity of the plant, plant having a large capaclV oelng hecessail!g hea1Iei - ,. lu d plant of smaller capacity. For the same capacity appreciable difference in the cost of the plants; in fact the plant is applicable to the preparation either class of pavement
 Sixth. Only the best grades of materials of
 
 dispute regarding this statement Neither any why equally good mat erial should be secured for sheet asphalt Topeka mixture under inspection.
 seventh. have large organization of experts the bituminous paving industry which available cities that purchase bitulithic ment"
 This statement applies equally well to the lnrg- organizations laying kind of bitumi2ous pavements the matter of that be adequately provided for in the guaranty provi- of the contract for any class of pavement.
 The remainder of the letter of June does contain statements of special import ance. Proceeding the letter of June 12.
 Notwithstanding the somewhat heated denial by representative of the Warren Brothers Com pany of correctness of my estimate of 64 per square yard the approximate of bitu- thic Topeka inches thick, including labor, materials and plant investment, the amount is approximately correct. In fact it is correct with narrower limits of accuracy than the usual approximate estimate There is mysterious unusually expensive ingredient in btulithic. composed of materials easily obtainable in the open market. Asphalt, stone, sand, limestone dust or Portland cement be bought by any contract or at sia raaza nrtc=s. correctness or the costs operations of laying will be testified disintereSted contractor acquainted with such
 regards the cost Of pavements 1, 2 inches n thickness bituthic. far I know, never laid of 1 thickness and Topeka sheet asphalt only instances. The cost, however, Topeka and bithuthc is approximately portona1 the thickness As between and inches is almost exactly proportional.
 A slight is introduced into the calcula- for 1-tnch pavement, because the cost of