238 
MR. W. H. BARLOW ON THE RESISTANCE OF FLEXURE 
Girder No. 3. 
Experiment No. 1. 
Experiment No. 2. 
Experiment No. 3. 
Experiment No. 4. 
inches. 
inches. 
inches. 
inches. 
Total depth 
3-02 
3-00 
3-00 
3-00 
Depth between upper and "I 
lower ribs J 
•98 
1-00 
1-01 
1-01 
Area of top rib 
1*03 
1-02 
•97 
1-01 
Area of bottom rib 
•99 
•98 
1-01 
•97 
Weight applied, lbs, 
40 
Deflection. 
•006 
Deflection. 
•005 
Deflection. 
•005 
Deflection. 
•005 
712 
•085 
•085 
•085 
844 
• -113 
1516 
•216 
•185 
•197 
•195 
1740 
•248 
2188 
2300 
•328 
•295 
•297 
•293 
2524 
•388 
2636 
•418 
•363 
•375 
2748 
•433 
•377 
2972 
•483 
•410 
•423 
Broke 
3028 
Broke 
•425 
•438 
3084 
•435 
•452 
3112 
•437 
Broke 
3224 
Broke 
Breaking weight, lbs 
3028 
3224 
3112 
2972 
•371 
Deflection with nine-tentlis 1 
of breaking weight, inches / 
•435 
•402 
•397 
Girder No. 4. 
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. 
3-99 
2-00 
1-00 
1-00 
inches. 
4-00 
2-03 
•97 
•99 
inches. 
3-99 
2-05 
•98 
•98 
inches. 
4-01 
2-04 
•98 
1-01 
Area of bottom rib 
Weight applied, lbs. 
Deflection. 
Deflection, 
Deflection. 
Deflection. 
40 
•002 
•002 
•002 
•003 
712 
•047 
•040 
•048 
•058 
1516 
•104 
•097 
•102 
•108 
1964 
•134 
2188 
•161 
•155 
•155 
•148 
2636 
•199 
•197 
•185 
•183 
3084 
•227 
•227 
•223 
•218 
3420 
•259 
3532 
•269 
•267 
•255 
•253 
3756 
•299 
•282 
•285 
3980 
•317 
•312 
•300 
•303 
4092 
•329 
•320 
•307 
4148 
•336 
•322 
•313 
— 
4204 
Broke 
•327 
Broke 
4260 
Broke 
•333 
4316 
4400 
•343 
4428 
4745 
Broke 
Breaking weigiit, lbs 
4204 
4260 
4204 
4745 
Deflection witli nine-tenths 1 
of l)reaking weight, inches/ 
•297 
•293 
•282 
•331 
