. Proceedings of the annual convention . 314 PROCEEDINGS OF THE PLATE JACK Note: Table on page 312, Plate 15. — — i/. CV2 <r i : - m5 c cu « up w xi • ^g, «a u PsM . Q £} — i4^ ==^=iiis FOURTH ANNUAL CONVENTION. 315 (First Vice-President McDonald in the chair.) Chairman McDonald:—You have before yon the report ofthe Committee on Signaling and Interlocking. We would beglad to have a preliminary statement from the Committee, if theyhave anything to say. Mr. J. C. Mock (Michigan Central) :—The first part of thereport, dealing with the historical development of mechanica

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. Proceedings of the annual convention . 314 PROCEEDINGS OF THE PLATE JACK Note: Table on page 312, Plate 15. — — i/. CV2 <r i : - m5 c cu « up w xi • ^g, «a u PsM . Q £} — i4^ ==^=iiis FOURTH ANNUAL CONVENTION. 315 (First Vice-President McDonald in the chair.) Chairman McDonald:—You have before yon the report ofthe Committee on Signaling and Interlocking. We would beglad to have a preliminary statement from the Committee, if theyhave anything to say. Mr. J. C. Mock (Michigan Central) :—The first part of thereport, dealing with the historical development of mechanicalinterlocking, is very brief, and is not to be considered valuable material was received too late for this expect to add this in the annual Proceedings. The reporton train-order signals is submitted to you with a view of adoptionas to location and design of casting. This subject we considerhas, been covered. The standard specifications are taken

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