3.(Pg. [129]) How may drops of rain be formed?
4.(Pg. [130]) What becomes of the water after it has fallen to the earth?
5.(Pg. [130]) What is the difference between rain water, and that from springs?
6.(Pg. [130]) Why is rain more pure than spring water?
7.(Pg. [130]) Why is spring water more agreeable to the palate?
8.(Pg. [131]) What causes the water to collect and form springs?
9.(Pg. [131]) Why cannot water penetrate through clay?
10.(Pg. [131]) What is represented by [fig. 9, plate 13]?
11.(Pg. [132]) How can you account for its rising upwards, as represented at C?
12.(Pg. [132]) In conveying water by means of pipes, how must the reservoir be situated?