Bulletin, Issue 39

Front Cover
University of Illinois, 1918 - Geology
 

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Page 73 - The sketch in the upper part of the figure represents a river valley that lies between two hills. In the foreground is the sea, with a bay that is partly enclosed by a hooked sand bar. On each side of the valley is a terrace into which small streams have cut narrow gullies. The hill on the right has a rounded summit and gently sloping spurs separated by ravines.
Page 20 - FIG. 12. Graph showing the precipitation (rainfall) at Winnebago, 111., about 10 miles west-northwest of Camp. The numbers at the left indicate inches of water. The several vertical lines represent the average rainfall for the several months, that at the left being January and that at the right being December. It will be seen that the greatest monthly precipitation is in May, when the amount Is something more than 4 inches (about 10 cm.), and that the rainfall is much heavier during the spring and...
Page 74 - In the foreground is the sea, with a bay that is partly enclosed by a hooked sand bar. On each side of the valley is a terrace into which small streams have cut narrow gullies. The hill on the right has a rounded summit and gently sloping spurs separated by ravines. The spurs are cut off sharply at their lower ends by a sea cliff.
Page 74 - GRANT streams have cut narrow gullies. The hill on the right has a rounded summit and gently sloping spurs separated by ravines. The spurs are truncated at their lower ends by a sea cliff. The hill on. the left terminates abruptly at the valley in a steep scarp.
Page 68 - The following year the road was extended to West Rockford (upon the completion of the bridge across the river) and on to Freeport (fig. 24; the Galena and Chicago Union is the Chicago and Northwestern). An arrangement having been made to connect with the Galena Branch of the Illinois Central at Freeport, the road was not built, as originally planned, to Galena. As a result the road through Rockford became a branch of the main line of the Galena and Chicago Union, which extended almost due west from...
Page 18 - C.), with maximum temperatures ranging up to 100 F. (nearly 38 C.) or more. The highest on record is about 110 F. (about 43 C.). Such extreme heat, however, is fortunately rare. January, with an average temperature of about 21 F. (about -6 C.) is the coldest month. The lowest recorded temperature is -26 F. (about -32 C.). Such extremely low temperatures are as rare as the very hot days of summer. The changes in temperature from month to month are shown in figure 11, where the big...
Page 10 - Kings area (Kings map), where the slope of the surface is soslight that water from rain and melting snow does not run off readily. This approach to flatness is indicated on the maps by the wide spaces between the contour lines. In this nearly flat tract the natural drainage is so poor that there has been some ditching and tiling, to assist the runoff of surface waters. Just as there are relatively few areas of upland which have poor drainage, so there are relatively few places where slopes are steep....
Page 73 - ... groups. The malleable iron works and the plant for the manufacture of saddlery also are especially noteworthy. Its great manufactories constitute perhaps the distinctive feature of modern Rockford, and they insure the city continued growth and prosperity. APPENDIX EXPLANATION OF MAPS The features shown on these maps may be classed in four groups: .(1) water, including rivers, creeks, and swamps; (2) relief, including ridges, hills, valleys, and other elevations and depressions; (3) culture (works...
Page 75 - The works of man are shown in black, in which color all lettering also is printed. Boundaries, such as State, county, city, land -grant, reservation, etc., are shown by broken lines of different kinds and weights.
Page 55 - Prairie Pirates" operated in the Rock Valley, particularly in Ogle County and southward. They robbed cabins, bought moveable property •Of 871 of the early settlers of Rockford, 470 were from New York and 237 from New England. The birth places of 102 of the early settlers of Rockton are known; more than half were New Englanders. As a rule the pioneers from the northeastern states were characterized by energy, thrift, and ingenuity, traits induced in no small degree through generations by the geographic...

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