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.= All the time that we are awake we are learning by means of our =senses= something about the world in which we live and of which we form a part; we are constantly aware of feeling, or hearing, or smelling, and, unless we happen to be in the dark, of seeing; at intervals we taste. We call the information thus obtained =sensation=. When we have any of these sensations we commonly say that we feel, or hear, or smell, or see, or taste, something. A certain scent makes us say we smell onions; a certain flavour, that we taste apples; a certain sound, that we hear a carriage; a certain appearance before our eyes, that we see a tree; and we call that which we thus perceive by the aid of our senses a =thing= or an =object=. 2. =Causes and Effects.= Moreover, we say of all these things, or objects, that they are the =causes= of the sensations in question, and that the sensations are the =effects= of these causes. For example, if we hear a certain sound, we say it is caused by a carriage going along the road, or that it is the effect, or the consequence, of a carriage passing along. If there is a strong smell of burning, we believe it to be the effect of something on fire, and look about anxiously for the cause of the smell. If we see a tree, we believe that there is a thing or object, which is the cause of that appearance in our field of view. 3. =The reason Why. Explanation.=