45. 〃 The Phenomena of Heat are the Effects of a rapid Motion of the Particles of Matter 63 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