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90 if an examination has to be made in the absence of the electric light when benzine vapour is likely to be about. In the motor-house there are three tanks which hold about six gallons each with self-contained pumps. Two of these contain oil, one being thick and the other more fluid. The third is a seamless steel barrel which holds benzine. There is also a large metal bottle with a screw top, in which is placed any old benzine that is used for cleaning purposes. The main store of petroleum spirit is at a considerable distance from all



buildings. One of the neatest types of self-contained oil reservoir and pump is that made by the Richter Oil Economising Company of Bradford. Many other types are in existence, but none of those with which I am acquainted is so well finished.

The roof of the house is strengthened at certain points by cross timbers which support two small H girders, and carry iron frames to which are attached pulley blocks. These little frames can be slid along the girders in the direction of the length of the carriages below. By means of this arrangement