d Meat Export Com- reaches the surface. The concrete formed ‘in this way all its parts were exposed to the elements. It was pro- pany has just recently ordered two large plants for takes several weeks to harden, and requires months vided with atwo-inch pop valve, which would be of | to attain its… … ing, and it is surprising to think part of the shell became the of the many instances—unknown heating surface of the boiler. till a few years ago—in which refrigerating machinery treated is divided into a number of small areas of The safety valve was blowing freely, and could be is now economically…
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