Weight of Drop 
-700 

“490 
—;— 


‘4:60 a eee ges | Le! 
rAd 
ra 
es 
430 aes Bee | 
400" ele ee 
C0) 02 o£ 08 “16 “32 
Trans. Roy. Soc. Edn® 


a 























“64 








