Part 3

46. 〃 The Structure of Water 65

47. 〃 Suppositions or Hypotheses; their Uses and their Value 67

48. 〃 The Hypothesis that Water is composed of Separate Particles (Molecules) 68

49. 〃 All Matter is probably made up either of Molecules or of Atoms 70

50. 〃 Elementary Bodies are neither destroyed nor is their Quantity increased in Nature 72

51. 〃 Simple Mixture 73

52. 〃 Mixture followed by Increase of Density; Alcohol and Water 74

53. 〃 Solution; Water Dissolves Salt 76

54. 〃 Quicklime and Water: Plaster of Paris and Water: Combination 79

55. 〃 Mineral bodies may take on definite shapes and grow, or increase in size, by the addition of like parts 82

(B.) LIVING BODIES.

56. 〃 The Wheat Plant and the substances of which it is composed 83

57. 〃 The common Fowl and the Substances of which it is Composed 85

58. 〃 Certain Constituents of the Body are very similar in the Wheat Plant and in the Fowl 86

59. 〃 Proteid Substances are met with in Nature only in Animals and Plants; and Animals and Plants always contain Proteids 87

60. 〃 What is meant by the word Living? 88

61. 〃 The Living Plant increases in Size, by adding to the Substances which compose its Body, like Substances; these, however, are not derived from without, but are manufactured within the Body of the Plant from simpler Materials 88

62. 〃 The Living Plant, after it has grown up, detaches part of its Substance, which has the Power of developing into a similar Plant, as a Seed 90

63. 〃 The Living Animal increases in Size by adding to the Substances which compose its Body, like Substances; these, however, are chiefly derived directly from other Animals or from Plants 90

64. 〃 The living Animal, after it has grown up, detaches part of its Substance, which has the Power of growing into a similar Animal, as an Egg 91

65. 〃 Living Bodies differ from Mineral Bodies in their Essential Composition, in the manner of their Growth, and in the fact that they are reproduced by Germs 91

III. IMMATERIAL OBJECTS.

66. 〃 Mental Phenomena 92

67. 〃 The order of Mental Phenomena: Psychology 93

SCIENCE PRIMERS.

INTRODUCTORY.

I. NATURE AND SCIENCE.

1. =Sensations and Things.=