July 1, 1886.] 



KNOWLEDGE ♦ 



289 



Fig. 1. — Tn'ELVE JIathematiciass. 



Fig. 2, — Sixteen Naturalists. 



>?.* 



fe-i 



Fig. 3. — Thietv-ose Academicians. Fig. 4. — Twexty-six Field-Geologists, T0P0GnAPHEHS,&c. 



COMPOSITE PORTRAITS OF AMERICAN SCIENTIFIC MEN 



