164 



SEEDING AND PLANTING 



cones the capacity of the kiln is low, due to the resistance of the 

 cones to opening. 



One of the most complete plants of the newer type is the one 

 at Annaburg, Germany, recently visited and described by Reck- 

 nagel. 1 In this plant there is a continuous movement of the cones 

 from the storage shed through the kiln, largely controlled by 

 automatic devices. As the cones are dried in large revolving 

 cylinders which keep them continually on the move, a uniform 

 temperature can be maintained. 



The Annaburg plant is a large one which cost $23,300 to con- 

 struct. It has, however, an annual capacity of 22,000 pounds of 



After Drawing by A. B. Recknagd 



FIG. 30. Cross section of the Annaburg seed-extracting plant. 



Scotch pine seed, which is extracted and cleaned at a cost of 5^ 

 cents per pound. It is operated by five men, viz., a superintend- 

 ent, a machinist, and three workmen (Fig. 30). 



The following description is from Recknagel's article: 

 "Side tracks (a, a') lead to the buildings. At (a) the cars 

 filled with cones are emptied and the cones immediately con- 

 veyed by a grain elevator (6) either to the storage house (c) or the 

 filling loft (d). If to the former, they are spread out not over 

 18 inches thick on the floor and occasionally shoveled about to 



1 Recknagel, A. B.: The equipment and operation of a Prussian seed- 

 extracting establishment. (Forestry Quarterly, vol. X, pp. 229-234. 1912.) 



