Bulletin, Issue 39

Front Cover
University of Illinois, 1918 - Geology
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Page 78 - 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 57 - ... since the region was tilled, as before. Cultivation of the land, too, has facilitated the passage of water through the soil, and ditching, tiling, and the drilling of many wells, have helped to lower the level of ground water. CHAPTER IV— NATURE AND MAN IN THE ROCKFORD REGION THE BLACK HAWK WAB During the first century of the history of the United States (17761876), the country experienced one year of actual war for every three years of peace. This was due largely to the numerous Indian wars...
Page 77 - 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 78 - 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 truncated at their lower ends by a sea cliff. The hill on the left terminates abruptly at the valley in a steep scarp.
Page 77 - 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 of man),...
Page 79 - 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 22 - ... 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 average difference, 53 F....
Page 70 - ... come by train to Cherry Valley, the end of the pioneer railroad in process of construction from Chicago to Rockford, expressed the following opinion of "staging": "At Cherry Valley private vehicles and coaches were in readiness to convey travellers to their destination; those bound to Galena were consigned to the latter, and were soon jolting over roads, respecting which they were assured every few miles that they were 'just passing over the worst.
Page 59 - 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...
Page 12 - Annals of the Association of American Geographers, Vol. VI, 1916. of the 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...

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