Model of a Regulated Forest 513 



All of the mechanism is, of course, hidden from view when 

 operating and an attempt will be made to make the "forest" more 

 realistic by dipping the stems of the "trees" into a thick brown 

 paint, and by making a brown forest fioor and a green meadow 

 surrounding the compartments. 



The principal part of the cost of material is in the brushes, 

 which amounted to about $15.00. The rest of the material cost 

 less than $5.00, and the labor was donated. 



[It may be of interest to add that many years ago, the well- 

 known Dr. Robert Hartig, of Munich, had constructed a model 

 of a regulated forest with age-class distribution, which, while 

 omitting the moving picture show idea of the above model, was 

 designed true to nature in relative dimensions and number of 

 trees per unit area, in each age class, in which respect the above 

 fails. 



A duplicate of Hartig's "Waldspiel" was exhibited at the 

 World's Fair by the United States Forestry Division and after- 

 wards found its way back to the Museum of the Department 

 of Agriculture at Washington. — [Editor.] 



