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Show Steamship Shaft Indicators. One of the most notable marine devices de-vices in the engine room of first class steamships is an arrangement by which the engineers are enabled to know whether wheth-er that part of the shaft which extends outside the ship's hold is working smoothly smooth-ly or not. In all twin screw ships this runs through a sort of tunnel fastened to the 6hip with big brackets. Of course it is impossible to get at this shaft during dur-ing a voyage. On the Paris, for instance, in-stance, this is said to be 40 feet long. To meet the objection in question a little, fine tube is made to pass along the top of the shaft which runs inside the ship, just over the 6haft, and water is constantly con-stantly running through this tube in a fine stream. The engineer on watch frequently fre-quently tries the temperature of this water with his hand, so that if the water were warm he would know at once that something was wrong with the working of the shaft and it would be Blowed down, or this not remedying the trouble the engines on that side would be stopped. New York Sun. |