returns is apparent. The preponderance of errors in the later
innings fits the established picture of increasing errors in the
presence of fatigue.

Another sample illustrates how a group improves through appli-
cation and conditioning. Charted in Figure 2 is the composite
curve first produced by a squad of University of Pittsburgh varsity
athletes; similar curves are produced in the fifth and fourteenth
tests; and the curve of improvement which shows the progress made
in fourteen weeks. Toward the end of the series there were indi-
viduals who produced 100% application curves. The aggregate of
all days for all individuals and groups helped to prove the pattern
of fatigue curves of the physiology laboratory tests. The italic num-
bers indicate errors of application.

 

Phys. Ed. Inning Appli-
Class No. 1 2 3 4 5, 6 7 8 9 10 cation
*Ist day 9. 214 .183: 169. 172 | 167. 159 155 - 187 “166 16%. 70%
2nd day 12 313 303 288 956 264 262 247 250 252 283 60%
8rd day 9 256 289 232 220 218 211 210 206 199 200 90%
4th day 13 879 365 345 323 825 315 300 297 289 274 90%
*5th day 15 496 466 451 421 407 409 871 874 359 337 80%
After Vaention
Ist day 13 856 353 838 3823 98381 $818 $04 297 282 276 90%
2nd day 6 38) VS 27 164 26% 159 153. 145 187 135 100%
8rd day 18 407 395 380 3863 856 $41 $30 321 3823 309 90%
4th day 10 $831 3811 3809 291 289 285 276 264 268 253 100%
5th day ll 382 363 3864 341 832 $24 312 3802 310 294 80%
6th day 9 294 294 271 271 266 265 257 248 289 224 80%
7th day ll 870 3867 856 $85 3831 824 3821 $809 $804 . 295 ae
8th day 12 407 407 3882 368 $875 356 342 3854 329 3820
*9th day 138 451 4384 420 409 391 384 876 865 357 309 100%

 

944 28161 27445 25617 25730 25059 24413 24153 23947 23660 23389 90%

* Plotted in fatigue curves on Figure 2.
Average daily Production plotted in the curve of Improvement.

Totals by innings of all days show a 90% Application Curve.

It does not appear entirely a coincidence that the most success-
ful athletes in the foregoing series had the best fatigue curves in
production and application. Further the best athletes appeared
to improve better than the less successful athletes.

Three particular athletes will be cited by name in the above
series. Cosgrove, a swimmer; Rhoades, a polevaulter; and Guada-
nangi, a catcher, produced erratic curves at first. Later they pro-
duced better curves with 100% Application. The first two broke
previous records after they had reached the higher quality of
fatigue curve. The last developed better than had been anticipated
by himself or coach. As the quality of their fatigue curve dropped,
so did their other performance. This is not the place for philosophi-
cal discussion, and for the present we shall merely state that those

23