142 BALCH, OS NATIVE GRAPES. 



results we can consider it so with small inaccuracy. The 

 percentage results obtained are as follows : 



Variety. Time of Gathering. 



Sjj. dr. 



Sugar. 



Add. 



Rogers' Xo. 15. 



Sept. 



5, 





9.20 





K (i I'. 





26. 



1.0783 



10.47 



.66 



It Ci 



Oct. 



5. 



1.0839 



-17.90 



■ .70 



Delaware. 







1.0896 



19.70 



.70 









1.1021 



20.63 



.65 



Hartford Prolific, 



Sept. 



26. 



1.0721 



15.01 



.43 



Concord. 







1.0615 



11.83 



.86 



Adirondac. 



Oct. 



5. 



1.0714 



14.00 



.28 



Allen's Hybrid, 







1.0780 



-16.20 



.59 



Union Tillage. 







1.0556 



-10.00 



1.21 



Rogers' Xo. 4. 



Sept. 



26, 



1.0749 



15.46 



.61 



a .. a 



Oct, 



5 > 



1.0819 



-17.30 



.65 



" Xo. 22. 



Sept. 



26, 



1.0723 



14.56 



.76 



a u a 



Oct. 



5. 



1.0796 



-16.70 



.59 



Clinton. 



Sept. 



26. 



1.0688 



13.77 



2.40 



Alvey (Hagar). 





21, 



1.0640 



10.37 



2.60 





Oct. 



5. 



1.0734 



-14.70 



2.02 



Franklin. 



Sept. 



•5, 





^.77 









a 



a 



21, 



1.0610 



11.20 



2.16 



Rogers' Xo. 3. 



•; 



26, 



1.0734 



14.70 



.66 



U 



Oct. 



5. 



1.0749 



-15.30 



.47 



« 19, 



Sept. 



26, 



1.0680 



13.65 



.81 



u u L 



Oct. 



5. 



1.0665 



12.60 



.62 



« 9, 



Sept. 



21. 



1.0680 



13.41 



.87 



it .. u 



.. 



26, 



1.0742 



15.00 



.57 



« 33. 





a 



1.0572 



11.70 



1.01 



- 41. 





•■ 



1.0749 



15.63 



.76 



" 30. 



Oct. 



5, 



1.0630 



-11.80 



.84 



The sugar percentage marked - in the table were not 

 obtained by analysis, but are Dr. Gall's for the corres- 

 ponding densities. 



From these analyses native grapes would seem to be 

 divided into three classes : — 



1st. Those in which the proportions of acid and sugar 

 are well balanced: as Delaware. Rogers' 4 and 15, Allen's 

 Hybrid. &c. : these grapes should yield good wine. 



