96

53. An iron beam-plow with rolling coulter and double
clevis 96

54. A rolling cutter-harrow 97

55. Spring-toothed harrows 97

56. Spike-toothed harrows 104

57. A coulter-toothed harrow 104

58. A plank harrow 105

59. To show transpiration 108

60. Amount of transpiration 109

61. To show that growing leaves contain starch 114

62. To show that starch disappears from the leaf when
the plant is placed in the dark 114

63. To show that sunlight is necessary for starch-making
by leaves 115

64. To show that chlorophyl is necessary for starch
formation in the leaf 115

65. To show the giving off of gas by leaves, and that
sunlight is necessary for it 118

66. Seedling radishes reaching for light 119

67. Elm leaves injured by the "imported elm-tree
leaf-beetle," a chewing insect 119

68. A horse-chestnut stem, showing leaves, buds, and
scars, where last year's leaves dropped off 128

69. An underground stem. Buds show distinctly 129

70. Flower of cherry 130

71. Flower of apple 130

72. Pistil and stamen of flowering raspberry 131

73. Flower of buttercup 131

74. A magnolia flower showing central column of pistils
and stamens 134

75. Flowers of squash 135

76. Flower of a lily 136

77. Bud and flower of jewel-weed or "touch-me-not" 137

78. Pistillate flower and perfect flower of strawberry 137

79. A crop of cowpeas 178

80. Red clover 179

81. Soy-beans in young orchard 182

82. A young alfalfa plant