34 THE CHINESE SUGAR-CANE 



Best eighth of an acre. 



Yield of juice from 3315 canes 253 gal. 



Yield'of syrup from 253 gallons of juice, . . . 58J " 



Rates of syrup per acre, 468 " 



Poorest eighth of an acre. 



Yield of juice from 2550 canes, 179 gal. 



Yield of syrup from 179 gallons of juice, . . . 43J " 



Rates per acre of syrup, 346 " 



Weight of 30 selected canes, ...... 49 J lbs. 



" of juice pressed out, 25| " 



" of crushed cane, 23 " 



Loss in crushing, | " 



Weight of crushed cane dried in sun, .... 9J *' 



*^ The following tests were made at the mill 

 by Dr. Robert Batty : 



Specific gravity of Chinese Sugar-cane juice, . 1.085 



of syrup, 1.335 



" " of New Orleans syrup, . . 1.321 



Thermometer applied to syrup, 77 deg. 



Thermometer applied to juice, 70 " 



Saccharometer, '* " ..... 25 J " 



'* The juice should be placed in the boilers im- 

 mediately on being pressed out, then boil slowly 

 until the green scum ceases to rise ; then stir in 

 a tea-spoonful of air-slacked lime to five gallons 

 of juice ; continue skimming and boiling until 

 the syrup thickens and hangs down in flakes 

 on the rim of the dipper. I have made the 



