The winds of British Columbia rise as they go inland. Therefore, the winds (atmosphere) in British Columbia become colder as they go inland. The atmosphere gives out moisture as it becomes colder. The atmosphere in British Columbia becomes colder as it goes inland. Therefore, the atmosphere gives out moisture in British Columbia. =Steps in Process.=--The various elements involved in a deductive process are often analysed into four parts in the following order: 1. _Principles._ The general laws which are to be applied in the solution of the problem. These, in the above deductions, constitute the first sentence in each, as, The air becomes colder as it rises. Air gives out its moisture as it becomes colder, etc. 2. _Data._ This includes the particular facts already known relative to the problem. In this lesson, the data are set forth in the second sentences, as follows: The prevailing winds in British Columbia come from the Pacific; the wind rises as it goes inland, etc. 3. _Inferences._ These are the conclusions arrived at as a result of noting relations between data and principles. In the above lesson, the inferences are: The atmosphere, or trade-winds, coming from the Pacific rise, become colder, and give out much moisture. 4. _Verification._ In some cases at least the learner may use other means to verify his conclusions. In the above lesson, for example, he may look it up in the geography or ask some one who has had actual experience.