| “The Battle of the Blood” | Frontispiece |
| FACING PAGE | |
| Mr. Upton Sinclair and Mr. Michael Williams | 16 |
| Mr. Horace Fletcher | 42 |
| Mr. Horace Fletcher Making a World’s Record | 52 |
| Professor Russell H. Chittenden, Ph. D., LL.D., Sc. D. | 70 |
| Professor Irving Fisher, Ph. D. | 82 |
| Mr. John E. Granger Breaking the World’s Record for Deep-Knee Bending | 88 |
| M. Elie Metchnikoff | 114 |
| Professor Lafayette B. Mendel, Ph. D. | 138 |
| Mr. Upton Sinclair’s Children | 146 |
| Mr. Sinclair’s Children | 176 |
| The Daily Swim | 206 |
| Fresh Air in Bermuda | 220 |
| Outdoor Exercise | 236 |
| Dr. J. H. Kellogg | 2580 |
| A Group at the Battle Creek Sanitarium | 27 |