CONTENTS. 



INTRODUCTION. 



PAQB. 



MATTES ATO FORCB 6 



MOLECULAR CONSTITUTION OF BODIES 6 



Distance between molecules, p. 7 ; Motions, p. 8 ; Size, p. 9 ; Rela- 

 tion to fertilizers, p. 11 ; to poisons, p. 12 ; to odors, p. 13. 



How ODORS AND FLAVORS FIND THEIB WAY INTO MILK 14 



Enter during secretion of milk, p. 14 ; Influenced by feed, p. 15 ; 

 From the air. p. 15 ; Introduced with solids, p. 16 ; Developed 

 after drawn, p. 16. 



DEODORIZING MILK 16 



Method, p. 16 ; Place, p. 17 ; Cooling, p. 17. 



WOBK 18 



ENERGY 19 



Conservation, p. 19 ; Source of the earth's energy, p. 20 ; Solar 

 energy, p. 20 ; How it reaches the earth, p. 21 ; Amount, p. 22 ; 

 Rate of transmission, p. 23 ; Kinds of waves, p. 23 ; Evapora- 

 tion of water, p. 24 ; Chemical changes produced, p. 24. 



NATURE OK HEAT AND COLD 25 



TEMPERATURE 25 



Measurement, p. 25 ; Accuracy of thermometers, p. 26. 



UNITS OF WORK AND ENERGY 27 



Foot-pound and foot-ton, p. 27 ; Horse-power, p. 27 ; Unit of heat, 

 p. 28. 



SPECIFIC AND LATENT HEAT 29 



Melting of ice, p. 31 ; Evaporation of water, p. 31 ; Cooling by 

 evaporation, p. 32 ; Effect of rain and snow on domestic ani- 

 mals, p. 33; Cooling milk, p. 34; Heat used In melting and 

 evaporating, p. 35. 



SUBFACB TENSION, SOLUTION AND OSMOSIS 36 



Rise of water in capillary tubes, p. 37 ; Evaporation and solution, 

 p. 38 ; Diffusion, p. 40 ; Osmosis, p. 41 ; Osmotic pressure, p. 42 ; 

 Osmosis In plant feeding, p. 46 ; Dissociation of salts In solu- 

 tion, p. 48. 



PHYSICS OP THE SOIL. 



CHAPTER I. 

 NATURE, ORIGIN AND WASTE OF SOIL. 



BOILS AWD SUBSOILS.. 49 



USES OF SOIL 50 



FORMATION OF SOIL 61 



Influence of rock texture, p. 51 ; Rock fissures, p. 53 ; Running 

 water, p 54 ; Glaciers, p. 57 ; Humus soil, p. 61 ; Wind-formed, 

 p. 63 : Animals, p. 64. 



