Chapter Vii.--Plants That Are Carried by Animals.

37. Squirrels leave nuts in queer places and plant some of them 61 38. Birds scatter nuts . . . . . . . . . . . . . . . . . . . . . 63 39. Do birds digest all they eat? . . . . . . . . . . . . . . . 64 40. Color, odor, and pleasant taste of fruits are advertisements . . . . . . . . . . . . . . . . . . . . . 65 41. The meddlesome crow lends a hand . . . . . . . . . . . . . . 68 42. Ants distribute some kinds of seeds . . . . . . . . . . . . 69 43. Cattle carry away living plants and seeds . . . . . . . . . 70 44. Water-fowl and muskrats carry seeds in mud . . . . . . . . . 71 45. Why some seeds are sticky . . . . . . . . . . . . . . . . . 72 46. Three devices of Virginia knotweed . . . . . . . . . . . . . 73 47. Hooks rendered harmless till time of need . . . . . . . . . 74 48. Diversity of devices in the rose family for seed sowing . . 76 49. Grouse, fox, and dog carry burs . . . . . . . . . . . . . . 76 50. Seeds enough and to spare . . . . . . . . . . . . . . . . . 78