6 CONTENTS. 



Page 



60. Laying out an Orchard 72 



61. How to Plant a Tree 73 



62. Propagation of the Grape 74 



63. Propagation of the Orange 77 



64. Pruning Fruit Trees, Vines and Bushes 78 



65. Structure and Nature of Fungi 81 



66. Structure and Nature of Bacteria 81 



PART V. ENEMIES OF CROPS. 



67. Apple Scab 83 



68. Fire Blight or Pear Blight 85 



69. The Mouth-parts of Insects 88 



PART VI. TESTING MILK AND ITS PRODUCTS. 



70. Experiments With Milk 94 



71. Analysis of Milk 95 



72. Test for Mineral Salts in the Ash of Milk 97 



73. Calibration or Correction of Glassware 98 



74. Determination of the Specific Gravity or Strength 



of Sulphuric Acid 99 



75. The Babcock Test of Milk 100 



76. The Babcock Test of Cream 103 



77. The Babcock Test of Skim Milk 104 



78. The Lactometer and Its Application. 105 



79. Testing the Acidity or Sourness of Milk and 



Cream 107 



80. Calculation of the Percentage of Milk Solids 107 



81. Test for Physical Adulteration of Milk 108 



82. Test for Chemical Adulteration of Milk 109 



83. Determination of Moisture in Butter 110 



84. Determination of Salt in Butter 112 



85. Determination of Per Cent. Fat in Ice-cream. . .112 



86. Standardization of Milk and of Cream.. .113 



