104 



posed and destroyed, the albumen that it contains is 

 coagulated, and, rising in froth, it brings with it all 

 the impurities. A large quantity of thick scum 

 forms on the surface. About 205 the scum cracks and 

 a clear juice is then seen. The heat is raised to 

 boiling and the steam is immediately shut off. After 

 a few minutes rest, the clear juice is first run off and 

 sent towards the filters, then the scum, which is put 

 into wollen sacks to be pressed. The juice from this 

 pressing is put with the other clarified juice. 



The clarified juice is limpid with a slight yell- 

 owish tinge. 



Evaporation. 



The filtered juice is by boiling in the evaporating 

 basin reduced until it marks 27 Beaume. If the 

 boiling is too quick, if the syrup rises, the efferves- 

 cence is quieted by throwing a piece of grease into 

 the vessel. When required this is done when boiling 

 down. 



The syrup at '27 is filtered a second time and 

 boiled down. 



Boil in {/ flnirn. 



Boiling down is the complement of evaporation. 

 The concentration is continued until the string proof 

 is attained. To establish this proof a little syrup is 

 taken between the thumb and forefinger which are 

 then separated. If the boiling down approaches its 

 termination, a very fine thread is formed which 

 breaks and returns on itself, twisting into the form 



