The practice of hand-turning in wood, ivory, shell, etc. : with instructions for turning such works in metal as may be required in the practice of turning in wood, ivory, etc. : also, an appendix on ornamental turning : a book for beginners (1868)
Campin, Francis · London : E. & F.N. Spon · leaf 51
hard woods, ivory, shell, &c., a very obtuse edge is required, and the direction of the axis of the tool should make an angle of about 85 deg. with the tangent to the work. All hard materials should first be reduced to the circular form by means of the point tool. The angles of cutting tools,… … / It is almost impossible to give too much care to the grinding of cutting edges, as upon the accuracy of the tool the neatness of the whole work depends.
Turning (Lathe work)
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
