and Strength of Materials. 255 
EXPERIMENTS. 
The first was on a slip of yellow Pine, one 
inch square, and two feet seven inches be- 
tween the props. 
RESULTS. 
Weighis|Defiections i cep bide 3 be Arithmetical Pro- 
in jinpartsofanjtaken off re-|gression, whose com-|Variations. 
Pounds. Inch. turned to. {mondifference is five. vy 
15 .05 0 4 = 1 
30 .08 0 9 —1 
45 12 0 14 —2 
60 “Lo 0 19 0 
75 | 25 0 24 a 
90 29 0 29 0 
105 4 0 34 0 
120 | .37 She 39 2 
oO 
=o 
135.| Al as 44 3 
sz 
150 45 ro 49 —4 
165 | 57 10 54 Ng 
180 | .64 2 59 +5 
195 | .70 3 64 +6 
210 73 - 69 +4 
225 78 : 74 +4 
240.1 .83 Ag 79 +4 
