XIV LIST OF EXPERIMENTS 



33. Expt. 42. The Capacity of the Lungs ., .- 86 



34. Expt. 43. The Level . . . . , 89 

 Expt. 44. Water Seeks its own Level. Size 



of Drops .'..'- . . . 90 



35. Expt. 45. Porous Bodies Absorb Water . 92 

 Expt. 46. To Make Porous Bodies Waterproof 93 

 Expt. 47. Filtration .- , . . . . 93 



36. Expt. 48. Solution and its Oddities .. .95 

 Expt. 49. The Use of Gasolene and Alcohol 



as Solvents ".'-. . . 97 



37. Expt. 50. Crystallization . . .98 



39. Expt. 51. Hard and Soft Water. Soap . 103 



40. Expt. 52. The Effect of Water upon Seeds 



and Plants . . . . 106 



41. Expt. 53. Examples of Capillarity . ' ; 107 

 Expt. 54. How Water is Held in the Soil . 108 

 Expt. 55. Capillarity in Plants ;...- . .110 



42. Expt. 56. The "Pocket Garden" . . 113 



43. Expt. 57. Germination Tests . . . 114 



44. Expt. 58. The Proper Depth of Planting . 116 



47. Expt. 59. A Flower Collection . . 122 



48. Expt. 60. A "Tree" Collection . 125 

 Expt. 61. Planting Tree Seeds . . 126 



49. Expt. 62. Fermentation 



51. Expt. 63. How to Preserve Milk . , 131 



58. Expt. 64. Measurement 



59. Expt. 65. Making a Balance and Weighing 156 



60. Expt. 66. Displacement of Water by Solids 



and Air . 



61. Expt. 67. Density - 161 



62. Expt. 68. Blue Prints from Tracings . .163 



