SUNSHINE THROUGH THE WOODS. 



3>5 



made, which takes only a few minutes, the time depending upon 

 tlie strength of the light and the porosity and translucency of the 

 wood, the print is subjected to the toning process, and, after wash- 

 ing and drying, is ready to become the negative from which the 

 final print is made. In order that the light may pass more readi- 

 ly through the negative it is soaked for a few minutes in kerosene 

 and wiped dry upon the surface. The negative is then placed 

 paper side down upon the plain glass in the printing frame, and 

 upon its face is brought the sensitive side of a fresh sheet of 

 paper, the two sheets being pressed close to each other and evenly 

 against the glass by the clamps, as before stated. In a very brief 

 ])eriod a positive print is obtained, which upon removal is toned 

 in the usual way, and becomes a picture the one, for example, 

 furnishing the subject for the engraving in Fig. 2. 



What with the brief description of the manner in which solar 

 prints of translucent objects are made, the reader may wish to go 



"v^^. 



>*, 



K 



'",'f''^''f**?'^' 



Fig. 2. 'Section of 1'afaw Wood. Positive. 



further and consider some of the differences of detail in the vari- 

 ous kinds of wood, for one kind of timber differs from another in 

 many ways. Should we, for example, turn to the Report on the 

 Forests of North America, in the last census, no less than four 

 hundred and twelve kinds of timber would be found distributed 



