SH 



THE POPULAR SCIENCE MONTHLY. 



positive, and corresponds closely with the wood itself in its light 

 and dark parts. 



The first essential in getting prints of woods is to obtain uni- 

 formly thin sections of the wood. Tliese are not far to seek, for 

 Mr. R. B. Hough has become famous for his wood sections. The 



Fig. 1. Section of Papaw Wood. Negrative. 



process by which he is able to obtain his beautiful sections is not 

 known to the writer ; but to him thanks are due for the specimens 

 which have been used in making the prints to illustrate this paper. 

 Having glanced at the two mentioned engravings and remem- 

 bering that very much of the fineness of detail is necessarily lost 

 in the engraving process, the reader is ready to consider the 

 method of making the prints. The sections of wood having been 

 secured, the only other things needful are a few " printing frames " 

 (one will answer) of the ordinary sort used by photographers. 

 Instead of the glass negative which the photographer uses and has 

 prepared in the dark room, a simple plain pane of glass is needed. 

 This is placed in the frame; upon it is put the section of wood, 

 and over the latter a sheet of the sensitized paper. This paper is 

 brought close upon the wood by means of the clamps, and the 

 frame is ready to be placed in the sunlight. After the print is 



