FOODS 



EXPERIMENT PAGE 



20. THE PRESENCE OF STARCH IN SOME COMMON FOODS . 31 



21. THE PRESENCE OF FATS IN SOME COMMON FOODS . . 32 



22. AN ARTIFICIAL EMULSION 33 



23. A NATURAL EMULSION . . . . -. . . . 34 



24. PROTEIDS IN SOME COMMON FOODS . . . ; . 35 



25.' EFFECT OF HEAT ON PROTEIDS 36 



26. THE PRESENCE OF WATER IN SOME COMMON FOODS . 36 



WATER 



27. PRECIPITATION AND FILTRATION 37 



28. SOLVENT ACTION OF WATER 38 



29. ORGANIC MATTER IN WATER 39 



30. FILTRATION. . . '.-.". . '"." . . . 39 



31. DISTILLATION . . . . . . . 40 



32. TO TEST THE PURITY OF YOUR HOME DRINKING WATER 40 



PRESSURE 



33- TO MEASURE THE WATER AND GAS PRESSURE IN THE 



LABORATORY TABLES 42 



34. TO FIND THE COST PER HOUR OF A SINGLE GAS BURNER 



IN YOUR HOME 43 



35. TO FIND HOW MUCH GAS YOUR HOME USES IN A WEEK 



OR MONTH . . -45 



36. BOYLE'S LAW 45 



37. ISOTHERMAL LINES 1 '. . 47 



38* BAROMETRIC CURVE 47 



39. HEAT OF COMPRESSION . 50 



40. COLD OF EXPANSION 50 



