3. Topographical survey of a locality (theoretically and practically,) reconnoitring, geometrical triangulation, detailed survey.
4. Hasty or rough sketch of certain objects, and entire (but limited) sections of country.
5. Drawing plans.
a. Notion of the elements of topography; rising and sloping ground, running and standing waters, division of ground in a military point of view, and characteristics of the same; open, inclosed, elevated, hilly, mountainous, broken ground.
b. Theory of plan drawing.
α. The first elements of the science of projection, and the construction of instruments for measuring slopes.
β. Fundamental rules for plan drawing in general, and for drawing mountains in particular. Statement of the various angles of depression of inclined planes through mountainous regions.
γ. Of the horizontals, and the laws dependent upon them, relative to mountainous districts.
δ. On the laws of defiles.
ε. On ascertaining the difference of elevation, and drawing profiles.