78 



In 1882 experiments were made at the Zootechuic school in Keggio, 

 Italy, by Professors Zanelli and Spallanzani. The means of the analy- 

 ses made by them are as follows : 



First series : 



Per cent, in the juice. 



Sucrofee 13.99 



Glucose 4.97 



Second series : 



Sucrose 11.55 



Glucose 7.82 



Two samples of sorghain juice (early amber) examined by Professor 

 Hilgard, of the University of California, showed the following mean comr 

 position : 2 



Specific gravity 1.070 



Total solids percent.. 17.00 



Sucrose do 8.10 



Purity 45.40 



A sample of juice from sugar-cane also grown in California showed the 

 following composition : 



Specific gravity 1. 076 



Total solids percent.. 18.4 



Sucrose do 16.9 



Purity 92.93 



Professor Hilgard adds the following observations : 3 



The above analyses exhibit, first, the superiority of the true sugar-cane over the 

 sorghum in respect to purity as well as total sugar contents, although in both respects 

 the former is here shown below the quality to which it attains in tropical countries. 

 There can be no doubt that wherever the tropical sugar-cane can be grown to ad- 

 vantage within the reach of intelligent labor and perfected appliances, it is superior 

 to the sorghum as a sugar-producing plant. 



Remarkable results were obtained by using special fertilizers in the 

 New Jersey experiments. 



In sixteen experiments the percentages of sugar in the cane were as 

 follows : 4 15.05, 13.13, 12.97, 11.74, 11.40, 12.50, 15.01, 11.79, 12.70, 15,20, 

 12.59, 13.57, 15.42, 15.93, 16.09, 15.37. Mean calculated for juice, 15.16 

 per cent. 



In 1883 two samples of sorghum juice were analyzed by Dr. H. P. 

 Armsby, chemist of the Wisconsin Agricultural Experiment Station. 



The results are given in the first annual report of the station, p. 79 : 



Sucrose 



(Jlucose 



Total solids. 



No. 1. 



Per cent. 



6.15 



3.32 



12.00 



No. 2. 



Per cent. 



7/85 



3.22 



13.50 



1 Annali di Agricoltura sul sorgho Ambrato, Eoma, 1883, pp. 20 et seq. 

 'College of Agriculture, University of California, report, 1882, p. 61. 

 3 Op. cit., p. 6i. 

 4 New Jersey Experiment Station, Bull. No. XXX, p. 7. 



