No. 1.—The improved Diamond Lathe (exhibited in the Paris Exhibition, 1855, by Phillippe).
No. 2 and 2 a.—The pincers, front and side view.
Tns Principle of Cutting.
No. 3.—a. The table of a brilliant. b. The triangular faces. The angles terminating into planes, d. Lozenges—4 large and small, e. The planes on the edge of the stone.
No. 3 a.—f. The angles parallel with the planes, g. Pavilion r facets corresponding to Lozenges.* h. The collet of the bril-ant.
No. 4.—A rough Diamond, cleansed.
" 5.—Cut of the crown.
" 5 a.—The three different cuts. a. The table. b. The girdle. The collet.
No. 6.—A Brilliant not recut.
" 7.—A Brilliant recut.
" 8.—Rose Diamond, a. The crown. b. The facets.