Mr. Thomson on an Apparatus for Emptying Railway Waggwis. 27 



charging waggons of three tons, with 24 inch wheels, and waggons of 

 only 20 cwt. and 20 inch wheels, with perfect facility and expedition 

 The cost of each apparatus does not exceed from j£IO to £11 com- 

 plete. 



Fig. 2. 



iia 6 



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