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time business too long. Just to give you some idea of how tremendous these large turbines are, listen to a brief story of the trouble of today. They were just starting the turbine up -- hadn't even gotit up to speed -- when they found their auxiliary oil pump was not functioning and the main pump had not "picked up" yet. They shut off the steam at once, but due to the tremendous energy in the rotor as it revolves, it took the thing so long to coast to a stop that the bearings were gone.

[[underlined]]To Willie, May 6, 1925:[[/underlined]] In a day or two I shall be working on a job of my own again. The appropriation has been made and I am merely waiting for the shop order, to which labor and material are charged. It is the wheel of a solenoid brake and resembles a big pulley. A section cut down through the middle of it looks like this:

[[image- hand drawn cross section of the solenoid braking system]]

They used a great many of these in all sizes on cranes, for example, where the moment the motor hoisting the load stops, a brake must be applied to hold the load from unwinding the cable. This is the wheel or drum on which the brake is applied by powerful springs. When the hoisting motor is running, its armature is in series with a solenoid which holds this brake open against the tension of the springs. Thus automatically the brake is applied the moment the motor stops because the solenoid is at the same time deenergized. Formerly this wheel was made form a steel casting but was very expensive and also unreliable, so now we are going to try building one up of component parts and brazing it, or rather, them, together. My other proposition involving the trapezoidal blocks, is now being checked up by the cost department. When they get through, we may do something. Just now, several of us have a hand in on a new refrigerating machine. ...... It certainly is true here that science and manufacturing go hand in hand. Research along every line is being carried on.