LIST OF ILLUSTRATIONS 



Figures Page 



1 Engine with single steam chest 22 



2 Tandem compound engine 22 



3 Common Blue Stem wheat 23 



4 New wheat originated by selection 23 



5 Cow bred for beef 24 



6 Cow specially bred for the dairy 24 



7 Map of Great Glacier and old Lake Agassiz 45 



8 Cross section of Minnesota river 46 



9 Cross section of Mississippi river 46 



10 Ancient and present drainage basin of Minnesota river. . 47 



11 Level, of the Mississippi and Minnesota rivers in glacial 



times 48 



12 Falls of St. Anthony at beginning of its recession 48 



13 Mississippi river at the Falls of St. Anthony 49 



14 Diagrammatic map showing origin of Minnehaha falls . 49 



1 5 Valley of a glacial river 50 



16 Gorge formed by cutting of glacial floods 50 



1 7 Corn plant at four stages 72 



18 Stem roots of corn plant nearly ready to tassel 73 



19 Crown and stem roots of mature wheat plant 74 



20 Pot containing artificially dried soil 75 



21 Pot of soil illustrating absorption of moisture 75 



22 Pot of soil moistened by rain 77 



23 Pot of soil illustrating action of capillarity 77 



24 Pot of soil containing ground water 78 



25 Pot of soil in state of saturation 78 



26 Pot of soil after drainage of ground water 79 



27 Pot of soil illustrating the action of capillarity 79 



28 Pot of soil dried by exposure to air and baking 80 



29 Pot of air-dried soil containing only hygroscopic water 81 



30 Capillary action illustrated in glass tubes of large and 



small diameter 82 



31 Capillary action between plates of glass 82 



32 Capillary action in lamp wick 83 



33 Soil saturated, with standing water at the bottom 84 



34 Subsoil, furrow-slice and dust blanket 84 



35 Pervious mass of soil over a layer of impervious clay or 



stone 85 



36 How flowing wells occur 86 



37 Plan of farmstead with road on north 101 



38 Plan of farmstead with road on east and south 102 



39 Plan of farmstead fronting road on south 103 



vi 



