240 
MR. W. H. BARLOW ON THE RESISTANCE OF FLEXURE 
Girder No. 6. 
Experiment No. 1. 
Experiment No. 2. 
Experiment No. 3. Experiment No. 4, 
Total depth ... 
Depth between 
lower ribs ... 
Area of top rib ... 
Area of bottom rib 
upper 
and 
inches. 
4-02 
2-52 
M3 
M3 
inches. 
4-05 
2-55 
M8 
1-09 
inches. 
4-03 
2-56 
1-08 
Ml 
inches. 
4-06 
2-61 
MO 
MO 
Weight applied, lbs. 
712 
1516 
2188 
2290 
2636 
2885 
3084 
3445 
3532 
3980 
4005 
4428 
4565 
4652 
4845 
4876 
4988 
5100 
5125 
5212 
5265 
5405 
Breaking weight, lbs 
Deflection with nine-tenths | 
of breaking weight, inches j 
Deflection. 
O) o 
.S 3 
.3 
i- O) 
g 3 , 
3 >1 
5W 
C/5 
(ft 
o 
Broke 
Deflection. 
•130 
•168 
•205 
•251 
•300 
•315 
Broke 
5125 
•298 
Deflection. 
138 
186 
220 
263 
•313 
Broke 
4845 
•293 
Deflection. 
•138 
•175 
•272 
•313 
•350 
•365 
•378 
•382 
Broke 
5405 
•340 
Girder No. 7- 
Experiment No. 1. 
Experiment No. 2. 
Experiment No. 3. 
Experiment No. 4. 
Total depth 
Depth between upper and 1 
lower ribs J 
Area of top rib 
inches. 
4-05 
2-50 
M9 
M9 
inches. 
4-10 
2-51 
1-26 
M9 
inches. 
4-08 
2-51 
1-21 
M7 
inches. 
4-05 
2-52 
M6 
M6 
Area of bottom rib 
Weight applied, lbs. 
Deflection. 
Deflection. 
Deflection. 
Deflection. 
2290 
•105 
•105 
•095 
•090 
2885 
•115 
•130 
•120 
•125 
3445 
•150 
•160 
•140 
•160 
4005 
•185 
•185 
•180 
•182 
4565 
•217 
•215 
•215 
•210 
5125 
•255 
•250 
•235 
•237 
5405 
•272 
•267 

5685 
Broke 
•285 
•270 
•272 
5825 
•292 
Broke 
5965 
•305 
Broke 
6105 
•310 
6245 
•320 
6385 
•330 
6525 
Broke 
Rreakiriir wcialit. lbs 
5685 
6525 
5965 
5825 
Deflection with nine-tenths'! 
of breaking weight, inches J 
•252 
•297 
•253 
•246 
