id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
inhs-304	Richardson, Robert	Illinois River Bottom Fauna in 1923	1925	35	.pdf	application/pdf	7617	321	61	The principal increases in number of group II species in lower lake cross-sections over 1922 were not in the extra-channel zones, as in the * Includeti as an upper lake station for bettor comparison will) 1922 records. The number of group II species taken below- Havana was, however, only half as many in 1923 as in 1920, in a mileage considerablv greater, though with the number of collections less, run- ning to a total of only six species in thirteen collections covering thirty miles of river length in 1923, compared with twelve kinds in twenty-two collections from about 19 miles of river in the summer three years before.	cache/inhs-304.pdf	txt/inhs-304.txt