Investigations Concerning Concrete Aggregates

One of the most interesting and important developments of recent years is the manufacture and sale of concrete delivered to the job, mixed and ready for use. In the United States and Canada there are over a hundred p1ants delivering commercially, concrete to the contractor, ready for use. D.H. Burrowes

There is persistent agitation for increased stresses and reduced loadings upon steelwork, and in the author's opinion any such steps must necessarily be accompanied by improvements in design or the standard of work will suffer. Charles S. Gray

THE CHAIRMAN, Mr. R. H. Stanger (Vice-President), in proposing a vote of thanks to Mr. Gueritte for his paper, said that, although he had not been closely connected with the problem of the design of cooling towers of reinforced concrete, he had had to test, some of the materials used in their construction, and could testify to the excellence of those materials. As one who had had to work at heights of 80 ft. or so on a 9-inch plank when serving his t.ime, and knowing how uncomfortable one could feel under such circumstances, he was particularly appreciative of the ingenious manner by which the scaffolding was erected on the insides of the towers, as described in the paper.