444 
II. Experiments on Percussion, made on a spring of Memei 
Deal, 20 feet long; Weight 16.87lbs. Weight of falling 
body 3.222lbs. Deflection by steady weight of 6lbs.=1 inch. 
By B. BEVAN, Esa. 
Inches 
Inches 
Squares. 
Fall, Deflection. 
2 1.33 1.7689 
4 1.68 2.8224 
8 2.08 4.3264 
16 2.60 6.76 
32 3.48 12.1104 
After adding to the middle of the spring, 4.85lbs. 
2 1.37 
4 1.60 
8 1.90 
16 2.26 
32 2.95 
After adding 10lbs. to the spring instead of the above: 
2 1.23 
4 1.36 
8 1.65 
16 2.35 j 
32 3.10 
a Se he 
