REARING 



191 



chopper is the machine which I have found most 

 serviceable for this purpose. The pieces of liver are 

 then 'screened' by being pressed through a sieve. 

 This sieve is a very simple contrivance. It consists 

 of a small wooden box, the bottom of which has 

 been knocked out and the top replaced by a piece 

 of perforated zinc securely fixed by nails. At first 

 the mesh of the zinc must be very fine (size No. 5). 



After having been separated from the skin by 

 scraping, the liver is rubbed through the perforations 

 of the zinc with an ordinary iron kitchen spoon, and is 

 collected in a small pail placed under the screen 

 (fig. 14). So finely is the liver separated by this pro- 



FlG. 14. 



cess that it is reduced to the consistency of a thin 

 paste. A little of it is now put into a ' feeder,' a 

 utensil which consists of a cylindrical vessel made of 

 a piece of finely perforated zinc of the same mesh as 



