ON RAILWAY CONSTANTS. 



211 



planes with the pointed end attached, and afterwards without that appendage. 

 The details of these two experiments were as follows : — 



July 11th, 1839. — Experiment No. I. 

 Eight Second Class Carriages, No. 12, 35, 5, 22, 9, 29, 30, 20. 



tons. cwts. qrs. 



Weight of Carriages and Load , ... 40 

 Ten Passengers 15 



Gross weight ... 40 15 

 Pointed end placed in front. 



Initial velocity 23'71 miles per hour, down JVIadeley Plane. 



p2 



