Military schools and courses of instruction in the science and art of war, / in France, Prussia, Austria, Russia, Sweden, Switzerland, Sardinia, England, and the United States. Drawn from recent official reports and documents. Revised Edition

by Unknown

Lessons 23–25. Conical Intrados—Intrados of Revolution.

Skew trompe in the angle. Suggestions on the general problem of conical skew vaulted roofs.

Spherical domes, &c.

Lessons 26–27. Intrados, a Ruled Surface.

Winding staircases, &c., &c.

Lesson 28. Helicodial Intrados.

Staircase on the Saint-Giles screw.

Lessons 29–31. Composite Vaulted Roofs.

Various descriptions of vaults.