Public works . KOLLING DRUMS OF G.^SOLINl:: TO IIOTOR TRLCK (SHOWN AT THE lUGIlT;GASOLINE TO TEST TRUCKS WHICH SUriLIEi: 24 PUBLIC \\ O R K S Vol. 52, Xo. 2. , SECTION OF SLAB SECTION B BROKE AWAYAND DROPPED BELOW LEVEL OF REST OP SECTION Later a shoulder of brick was placed on both sidesof the track for its entire length, and the mudwashed off, since which time very little of this trou-ble has been encountered. TEMPERATURE CHANGES IN DIMENSIONS Ames dials (an instrument so constructed thatmovements as minute as 1-10,000 of an inch are de-tected) were fitted with a special iron jacke
Public works . KOLLING DRUMS OF G.^SOLINl:: TO IIOTOR TRLCK (SHOWN AT THE lUGIlT;GASOLINE TO TEST TRUCKS WHICH SUriLIEi: 24 PUBLIC \\ O R K S Vol. 52, Xo. 2. , SECTION OF SLAB SECTION B BROKE AWAYAND DROPPED BELOW LEVEL OF REST OP SECTION Later a shoulder of brick was placed on both sidesof the track for its entire length, and the mudwashed off, since which time very little of this trou-ble has been encountered. TEMPERATURE CHANGES IN DIMENSIONS Ames dials (an instrument so constructed thatmovements as minute as 1-10,000 of an inch are de-tected) were fitted with a special iron jacket andused in measuring temperature changes through-out the entire width of a slab at two-foot intervals,and along both edges of the slab (which was 150feet in length) at 6-foot intervals. Observationswere carried on for a considerable period, the mostimportant ones being obtained when the day waswarm and the nights quite cool. The results from these observations were a sur-prise to many of the engineers. At 1 P. M. one sideof the slab was turned down .008 inch below thehorizontal level of the slab and at the same hourthe center of the slab was raised
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectmunicip, bookyear1896
