620 
neering. Prelim. Rep. Ill. State Bd. Health, on Water Sup- 
plies of Illinois and the Pollution of its Streams, Appendix, 
II., pp. 49-81. 
[’91.] The Lakes and Gulf Waterway as related to the Chicago 
Sanitary Problem. xv +92 pp. Appendices, 34 pp. With 3 
maps and 1 profile. Chicago, (1891.) 
Forbes, S. A. 
80. The Food of Fishes. Bull. Ill. State Lab. Nat. Hist., Vol. 
I., No. 3, pp. 18-79. 
88. Studies of the Food of Fresh-Water Fishes. Bull. Ill. State 
Lab. Nat. Hist., Vol. IL, pp. 433-474. 
96. Biennial Report as Director of the Illinois State Laboratory 
of Natural History for 1895 and 1896. 31 pp., 20 pl. 
Fuhrmann, O. 
00. Beitrag zur Biologie des Neuenburger Sees. Biol. Centralbl., 
Bd. XX., pp. 85-96, 120-128. 1 Fig. 
Garbini, A. 
93. Primi materiali per una monografia limnologica del Lago 
di Garda. Mem. Accad. Agric. Art. Com. Verona, Ser. 3, 
Vol. LXIX. 73 pp. 
Greenleaf, C. E. 
85. The Water-power of the Mississippi River and some of its 
Tributaries. Tenth Census of the U.S., Vol, 17, Pt. II., pp. 
119-276. 
Hensen, V. 
87. Ueber die Bestimmung des Planktons, oder des im Meere 
treibenden Materials an Pflanzen und Thieren. Finft. Ber. 
d. Komm. zu wiss. Untersuch. d. deutsch. Meere, pp. 1-107-+- 
I-XVIII, Taf. I.-VI. 
95, Methodik der Untersuchungen bei der Plankton-Expedition. 
200 pp. Mit 114 Fig. im Text, 11 Taf. und 1 Karte. Kiel 
und Leipzig. (Ergebnisse der Plankton-Expedition der Hum- 
boldt-Stiftung, Bd. L., B.) 
Huitfeldt-Kaas, H. 
98. Plankton in norwegischen Binnenseen. Biol. Centralbl., 
Bd. XVIIL., pp. 625-636: 2 Fig. 
Jordan, EK. O. 
700. Some Observations upon the Bacterial Self-purification of 
Streams. Journ. Exper. Med., Vol. V., pp. 271-314, Pl. XX. 
