50 MANUFACTURE OF FERTILIZING MATERIALS 



the crusher, and is crushed for the log washer when too large 

 to pass through the separator. 



No. 7, crusher which crushes the rock for the log washers. 



No. 8, first set of double log washers. 



No. 9, set of single log washers where the rock goes after 

 passing through the set of double log washers. 



No. 10, rinser which gives the rock its final washing before 

 depositing upon the picking tables where it is picked by hand. 



No. 11, circular picking table upon which the rock is picked. 



No. 12, ore bin where rock is dumped after being picked 

 on picking table. 



No. 13, mine car that receives ore from the bottom of the 

 ore bin through a chute, and is used to carry the ore to the 

 drying sheds, where it is burnt before loading upon the railroad 

 cars for transportation. 



No. 14, 200 H.P. engine horizontal type, for driving ma- 

 chinery. 



Nos. 15 and 16, line shafts for pulleys and belting. 



No. 17, hoisting drum for hoisting skip-cars from pits up 

 to the washer to dump the wet, crude ore on bars for treatment. 



No. 18, universal joint connecting shafts of log and line 

 shafts as all log washers have to be inclined to allow water to 

 run down through them to thoroughly wash ore. 



Nos. 19 and 20, other universal joints in shafting. 



No. 21, chute for sliding ore into separator. 



No. 22, gearing of the log washers. 



To reduce the moisture to the required 3 per cent 

 the producers of land-pebble phosphates use me- 

 chanical dryers entirely. While there are several 

 kinds of these dryers, all are of the rotary-cylinder 

 type; that is, heated air and gases of combustion 

 are made to pass through the cylinder from a 

 furnace. The wet phosphate ore is fed automat- 

 ically into the cylinder and by means of shelving 



