A popular treatise on gems, in reference to their scientific value; a guide for the teacher of natural sciences, the jeweller, and amateur: together with a description of the elements of mineralogy, and all ornamental and architectural materials .. T Technology
A history of the planing-mill, with practical suggestions for the construction, care and management of wood-working machinery T Technology
Laboratory wearing test to determine the relative wear resistance of sole leather at different depths throughout the thickness of a hide T Technology
