| FACING PAGE |
| Photograph of one of the athletes | [190] |
| Photograph of soldiers taken at the close of the experiment | [194] |
| Photograph of soldiers taken at the close of the experiment | [194] |
| Photograph of Fritz at the close of the experiment | [200] |
| Photographs of the dogs experimented with |
| Subject No. 5 August 19, 1905 | [248] |
| Subject No. 5 November 18, 1905 | [248] |
| Subject No. 5 April 24, 1906 | [248] |
| Subject No. 5 June 27, 1906 | [248] |
| Subject No. 3 August 19, 1905 | [251] |
| Subject No. 3 November 18, 1905 | [251] |
| Subject No. 3 April 24, 1906 | [251] |
| Subject No. 3 June 27, 1906 | [251] |
| Subject No. 13 January 2, 1906 | [252] |
| Subject No. 13 February 27,1906 | [252] |
| Subject No. 13 April 24, 1906 | [252] |
| Subject No. 13 June 19, 1906 | [252] |
| Subject No. 15 January 2, 1906 | [252] |
| Subject No. 15 February 27, 1906 | [252] |
| Subject No. 15 April 24, 1906 | [252] |
| Subject No. 15 June 19, 1906 | [252] |
| Subject No. 20 January 2, 1906 | [252] |
| Subject No. 20 February 27, 1906 | [252] |
| Subject No. 20 April 24, 1906 | [252] |
| Subject No. 20 June 19, 1906 | [252] |
| Subject No. 17 January 2, 1906 | [256] |
| Subject No. 17 February 27, 1906 | [256] |
| Subject No. 17 April 24, 1906 | [256] |
| Subject No. 17 June 27, 1906 | [256] |