Label on Jullien's Collection of Reliefs France found this new geometry so important to fortification design that it was held as a state secret for several years. An example ... for Descriptive ...

They are intended to show a line (1) by its projections ... commend Mr. Jones's work to students of solid geometry. Descriptive Geometry Models for the use of Students in Schools and Colleges.

(1) MANY attempts are now being made to formulate a system of geometry suitable to the immature minds of schoolboys, which will on one hand develop their reasoning faculties by some kind of ...