Suggestions on vaulted roofs with polygonal edges and with ogival edges.
Lesson 32. Revision.
Spirit and method of stereotomy.
Degree of exactness necessary. Approximate solutions. Case where it is proper to employ calculation in aid of graphical constructions.
Review and comparison of different appareils.
MECHANICS AND MACHINES.
GENERAL ARRANGEMENTS.
The pupils execute during the two years of study:—
1. Various drawings or plans of models in relief representing the essential and internal organs of machines, such as articulations of connecting rods, winch-handles and fly-wheels, grease-boxes, eccentrics worked by cams or circles giving motion to rods; the play of slides, &c.; cylinders of steam-engines, condenser, pistons, and various suckers; Archimedes’ screw, and other parts of machines.
The sketches of the plan drawings are traced by hand and figured. The drawings in their finished state are washed and colored according to the table of conventional tints; they all carry a scale suitably divided.