98 BUILDINGS AND STORES. 



while a revolving brush prevents the meshes from being" 

 choked. Sand and dust pass through the first section 

 and fall into the space while the small and broken beans 

 are delivered below, the best and largest beans are caught 

 up and the peaberry rolls freely out at the end. 



Though there is no necessity for curing the Coffee, 

 and it may be hulled at once if desired, the exigencies of 

 climate render a properly constructed warehouse one of 

 greatest desiderata. The characteristics of structure 

 must be, first, dryness combined with security; hence, 

 galvanized iron forms the best material. It is generally 

 of two stories, the lower floor being sometimes boarded 

 or asphalted, but the upper must always be so made so 

 as to admit of free circulation of air through the Coffee 

 placed in it. This object may best be obtained by laying 

 wire gauze or coir matting over reapers about one inch 

 apart. Abundant ventilation must also be provided, and 

 it will be necessary to watch for any signs of heating. 

 Immediately on its appearance the Coffee must be turned 

 over rapidly. An improved form of Coffee structure is 

 that built on what is termed the Clerichew principle, in 

 which the floor of the upper story is constructed as in 

 the former case, resting on joists running lengthwise in 

 the building. A ceiling is provided for the lower stoiy 

 by tacking to the joists cloth which has been well soaked 

 in boiled rice water and lime, to render it air-tight. Con- 

 tinuous air-passages are thus made beneath the floor. 

 About ten feet of one end of the lower apartment are par- 

 titioned off, and its sides are made as nearly air-tight as 

 possible, and it has no ceiling other than the floor above, 

 so that the passages all open into it. In an opening in 

 the wall of this chamber a pair of large revolving fans 



