PAPERS OX BIOLOGY AND AGRICULTURE 



175 



Ending 

 Axis. 29 

 - - : 

 Sept 12 

 Sept. 19 

 Sej t 

 Oct. 

 Oct. 

 Oct. 

 Oct. 

 Oct. 

 Nov. 

 Nov. 

 Nov. 

 Nov. 

 Dec. 

 Dec. 

 Dec. 

 Dec. 



Jan. 

 Jan. 

 Jan. 

 Jan. 

 Jan. 

 Feb. 

 Feb. 

 Feb. 

 Feb. 

 Mar. 

 Mar. 

 Mar. 

 Mar. 

 Apr. 

 Apr. 

 Apr. 

 Apr. 

 Mav 

 Mav 

 May 

 Mav 

 May 

 June 

 June 

 June 

 June 

 July 



Week Soil ?=tr. 

 No. Coll. Ave. 

 9 1 19 

 14.5 



Loaf Str. Herb Str. 

 Coll. Ave. ColL Ave. 



Shrub Str. 



26 



3 



10 



17 



24 



31 



7 



14 



21 



28 



5 



12 



19 



26 



2 



9 



16 



23 



30 



II 



11 



:: 



13 



14 



15 

 M 



17 



:f 

 19 



88 

 21 



:: 

 : : . 



24 

 25 

 28 



:- 

 ;; 

 88 

 38 

 3: 

 33 

 33 

 34 

 35 

 ci 

 33 

 38 

 38 

 M 

 41 

 42 

 43 

 44 



15 



46 

 47 



4S 



ts 

 so 



': 

 5: 



JS 



o.o 



3 



15.. 



22 47 1 9 1 4 



29 48 1 S 1 7 1 34 



5 49 1 1 12 1.5 24 



12 50 1 10 1 6 1 54 



19 51 1 10 1 5 1 40 



26 52 1 1 



3 53 1 14 



Fig. 1. Graph of the Animal Population 

 Feet in an Illinois Elm-Maple Forest, July, 19 



21 

 32 

 43 

 24 

 60 

 133 



146 

 125 

 85 

 54 

 33 

 36 

 51 

 22 



34 

 58 



15 



22 

 22 

 90 

 10 

 16 

 29 

 7 

 13 

 23 

 74 

 28 

 68 



34 

 39 

 26 

 9 

 9 



5.8 

 18.3 



22 

 30 

 54 

 2s3 



25 

 23 

 20 

 16 

 37 

 11 



11 

 39 



3 



51 



400 



Coll. 

 1 

 5 



Ave. 



1 



3.4 

 15 

 15 



78.5 

 69 



24 



14 

 5 



4.5 

 4 

 9 

 

 

 





 

 





 

 

 

 

 3 



1 



2 



23 



163 

 398 

 64 

 51 

 63 

 42 

 8 

 25 

 31 

 32 

 20 



46.8 

 68.1 

 90 



207.5 

 498 



208 



_■; 

 169 

 121.5 



H 



93 



48 



66 



43 



45 



67.5 



18 



100 

 17 

 23 

 36 

 21 

 32 



Per 

 Per Hec- 

 Acre tare 

 (Thous 



95 

 46 

 136 



200 

 501 

 491 

 134 



91 

 35 

 95 



S6 



V 



94 



515 

 749 

 990 

 946 

 2383 

 54-0 



2288 



23-52 

 1859 



1337 

 902 



1023 

 52> 

 726 

 473 



495 

 743 



I : i 



In 

 258 

 396 

 231 

 352 



1045 

 506 

 1496 



2200 

 5511 

 5501 

 1474 



1001 

 385 



1045 

 946 

 957 



1034 



1263 

 1838 

 2437 

 1332 



5602 

 13448 



5616 



5734 

 4773 

 3388 



2214 

 2511 

 129- 

 1783 



1161 



1215 

 486 



2700 

 459 

 621 

 972 

 587 

 864 



2565 



377: 



5400 

 13527 

 13257 



361S 



2457 

 955 



-:-- 



2349 



of an Area of Four Square 

 21-June, 1922, inclusive. 



