•tio 



HUSKING AND CLKANING )NIKKK()US SEEDS. 



(ill) admits cool air and {<>,<>) are ventilating tubes arranged so 

 as to keep the i)avcd floor cool. B, C, and D are drying 

 chambers. 



(c) Driun-sieves. — Apparatus with drum-sieves dift'er com- 

 p]<!tely from those described above, and are used in many places, 

 in Silesia, Hannover, Mecklenburg, &c, (fig. 335). 



The hot air is then supplied by means of closed pipes {in,)ii,vi) 

 made of trachyte and closed with iron valves, which are situated 

 beneath the drying chamber. The cones 

 are supplied from the floor of a loft B. 

 passing through the funnels {a, a) into the 

 drums {J>,h) which revolve in pairs on a 

 common axle ; they are turned by handles 

 in the room (' so that the seeds may 

 fall through as soon as the cones have 

 opened. The drum-sieves are of wood 

 with wooden gratings secured by several 

 iron hoops. Each drum can be opened 

 (fig. 336, [i) in order to insert and remove 

 the cones ; under each pair of drum- sieves 

 is a masonry or concrete trench {}>} into 

 which the seed falls, and from which it is 

 removed by wooden scrapers into the 

 chamber C, into which the trenches lead. 

 After the seeds have all been removed, 

 the drums are opened downwards and the 



"^ ' empty cones removed by the same means 



iis the seed. The drums are turned at 

 intervals of a quarter of an hour, so that the seed soon falls into 

 the cool trenches and being at once removed is not exposed to the 

 hot air longer than is absolutely necessary. This rapid action 

 allows much greater heat to be applied to the cones than in other 

 establishments ; recent experience, however, shews that they are 

 not more efl'ective than the latter, which ure on the whok' 

 preferable. 



3. SejHiratioH of Scnl from the Couch hy Steam. 

 C'ones arc opened by steam, when the air round the trays in 

 wliich they are placed is heated by means of condensed steam. 



