528 
state. Seventy-three of a possible 102 replies were received. The fol- 
lowing tabulation by counties is taken directly from the letters received. 
It should be noted that these reports are not exhaustive, as no stirveyor 
would be expected to have a complete list of all the undisturbed areas 
of his county. In some cases more definite statements are desirable, but 
the ones given are included with the hope that they may be of value to 
other workers in the field. Unfortunately, grazing was not suggested 
as a type of disturbance in the letters of inquiry, and some of the areas 
here reported have been pastured and are now generally blue-grass pas- 
tures. Where this fact is known it has been added by the writer. 
Asterisks refer to regions investigated in this survey. 
Adams. Lowlands along the Mississippi River extending through 
three townships north of Quincy. 
Bond. A few small tracts in addition to numerous roadsides. 
*Bureau. Several thousand acres of sand and swamp prairie along 
Green River. Mostly pastured. 
*Carroll. Several thousand acres of sand prairie and flood-plain 
prairie south of Savanna. Most of the sand prairie and some of the 
flood-plain prairie has been pastured. 
*Cook. About 5,000 acres on the old lake bed of Lake Chicago and 
a few small tracts on the Valparaiso moraine. There are 2,000 acres 
in the vicinity of Ashburn within the city limits of Chicago. 
*Crawford. One hundred and sixty acres two and one-half miles 
northwest of Porterville. Pastured. 
De Kalb. About four acres near Maple Park. R. E. Wagner. 
Dupage. Small areas along east branch of Dupage River between 
Swift and Lisle. 
*E fingham. A few small tracts and roadsides. An 80-acre tract of 
Andropogon prairie on the farm of David Woods, 9 miles southwest of 
Dietrich, was reported to the writer in 1918. Forty acres of this tract 
reported plowed in 1917. 
Fulton. Lowlands along the Illinois River. 
*Grundy. “Hay swamps” north of Coal City; 220 acres 5 miles 
west of Morris along the Illinois River. Mostly flood-plain; some mo- 
raine and mostly pastured. 
Hancock. Flood-plain along Mississippi River south of Warsaw. 
*Henry. Sand and swamp land in northern part of county. Mostly 
pastured. 
*Jasper. Forty acres southwest of Gila and 320 acres 3 miles east 
of West Liberty. Pastured. Burke’s prairie of 2 acres two miles south- 
west of Wheeler. Virgin. A small area northwest of Wheeler now 
under cultivation. 
*Jo Daviess. Some prairie in north and southwest part. Pastured. 
Madison. Wet prairie in Shonteau township. 
