11.(Pg. [120]) What circumstances occasion oil to float upon water?
12.(Pg. [120]) What is the nature and use of the instrument represented in [fig. 1, plate 13]?
13.(Pg. [120]) What difference is there in the gravitation of solid masses, and of fluids?
14.(Pg. [121]) What results as regards the pressure of fluids?
15.(Pg. [121]) How is this illustrated by [fig. 2, 3, plate 13]?
16.(Pg. [121]) From what does the lateral pressure proceed? and to what is it proportioned, as exemplified in [fig. 5, plate 13]?
17.(Pg. [122]) Has the extent of the surface of a fluid, any effect upon its pressure downwards?
18.(Pg. [122]) What will be the difference between the pressure upon the bottom, and upon one side of a cubical vessel?
19.(Pg. [122]) What occasions the upward pressure, and how is it explained by [fig. 4, plate 13]?
20.(Pg. [123]) How could the equilibrium of fluids be exemplified by pouring water in at the spout of a tea-pot?