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In this concluding article we will pass briefly under review various appliances for testing and measuring deflection, and also some of the more simple apparatus useful in controlling certain kinds of reinforcement.
WHEN the water content of cement grout exceeds a certain percentage a sediment is rapidly formed. Grout begins to be formed at a mixture by weight of about 35 parts of water with 100 parts of cement. If the water content is increased above this point the cement tends to settle to the bottom. This is a disadvantage at all casting with cement grout; because the consistency of the grout cannot be varied to any extent by subsequent addition of water. When the method of pouring grout through a tube on a crushed stone bed is used for submarine concrete construction, it is consequently impossible to moderate the strength of the concrete, it will always require the same excessive quantity of cement. It is certainly true that it will also produce a very high class concrete, if the work has been well performed. Carl Forssell
The following simple problem in Graphic Statics is swpplied by The Bennett College, Sheffield, the Governor of which will gice a prize of 10s. for the best solution. In allotting points, neatness will receive the same consideration as accuracy.