m the essential pacity variable with the power of the machine. They through the cock, D, and the pipe, L. and are then oil. Such is no longer the case when the operation is are closed by a disk with a tight joint that carries sev- compressed and forced through the pipe, M, intoa performed with the… … apertures extending in the direction of the through from side to side, height. All the frames one of the apertures being may be superposed, form- in a central and the other in a side portion of the ing so many hermetically closed receptacles. In order a receptacle, R, which at the same time…
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