TY - JOUR
AB -  CONCRETE SPRAYING. A pneumatic concrete spraying machine for coating surfaces with concrete mortar has been sent to the Isthmus of Panama, and it will be tested for a period of 30 days in coating the surface of rock in Oulebra Cut, for the purpose of preventing deterioration. Much of the rock in the Out, which is hard and firm when first excavated, crumbles rapidly on exposure to the air. ANALYSIS OF FURNACE GASES. In connection with its investigations bearing upon the improvement of furnace conditions and on efficiency in the use of fuel, the Bureau of Mines has just issued a bulletin describing the apparatus and methods in use by the bureau for the sampling and analysis of furnace gases. The authors, J. 0. W. F’razer and E. J. Ho ifman, say in their foreword, "The furnace conditions prevailing both in small plants and in large industrial establishments in this country are frequently far from satisfactory. If such conditions are to be improved, they must be more thoroughly understood, and means must be found to insure complete combustion of the fuel, and yet to permit operation with such an excess of air as will result in the greatest 
TI - CONCRETE SPRAYING
JF - School Science and Mathematics
DO - 10.1111/j.1949-8594.1911.tb03485.x
DA - 1911-11-01
UR - https://www.deepdyve.com/lp/wiley/concrete-spraying-hZR7i1E7xh
SP - 723
VL - 11
IS - 8
DP - DeepDyve
ER -