36 CONTIN UO US RA IL WAY BRA KES. 



TEST NUMBER 5. 



Smith's Vacuum Brake: 



Boiler pressure on applying; ejeclor 108 pounds 



" " on shutting off ejector 108 " 



Vacuum 20 inches 



Westinghouse Automatic Brake : 



Pressure in air reservoir 90 pounds 



We quote that portion of the article bearing more particularly upon the 

 trials made by the North British Eailway Company: 



"We publish this week a very complete table in which are arranged all 

 the important deductions from these trials, as well as a second sheet con- 

 taining exact reproductions of the diagrams taken, and some miscellaneous 

 data. These diagrams and the table taken together are so clear as to re- 

 quire little comment. We propose, however, to point out some of the most 

 interesting features in them. It will be observed that, for convenience of 

 comparison, the stops made by the Vacuum and Automatic trains are ar- 

 ranged in pairs, the initial speeds in each pair correspoflidipg, if not exactly, 

 at least so nearly as to preserve the comparison accurate. In the same way 

 the lines recording both Vacuum and Automatic stops for the correspond- 

 ing speeds are arranged upon one diagram, the index figures attached to 

 which are repeated in the Table. These figures show the number of the 

 stops made on the da}' of the trial, and all of which we have not thought it 

 necessary to reproduce. 



Diagrams Nos. 2, S. V. and 3 W. A. (Test No. 1), refer to the perform- 

 ances of the Vacuum and Automatic brakes respectively, and the lowest 

 speed at which steps were made. An analysis of this diagram and its re- 



