id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
inhs-330	Forbes, Stephen; Richardons, Robert	Some Recent Changes in Illinois River Biology	1919	20	.pdf	application/pdf	7251	207	57	After calling attention to the fact that the fishery of the Illinois River is more valuable than that of any other fresh-water river fishery in the United States, and is exceeded only by the Great Lakes and the salmon industry of the Pacific coast, and that, owing mainly to reclamation oper- ations, the yield of the river has lately been reduced to about a third that previously reported, they say : It would seem, however, that there is prospect of a good profit by intelligent fish culture in the ponds and water courses remaining within the levee districts, provided that the industry is carried on as an adjunct to farming in much the same way that poultry is ordinarily raised upon the farm. Such conditions occurred in their earlier f^hases between Lockport and Morris before 1900 at low water; but in 1911 not until somewhere between Marseilles and Spring Valley ; while optimum conditions for green plankton apparently occurred at or above LaSalle before 1900, but in 1911 not much if any above Chillicothe, and in 1918 not much above Peoria.	cache/inhs-330.pdf	txt/inhs-330.txt