.34 BULLETIN" 466, U. S. DEPARTMENT OF AGRICULTURE. 



Table XX. — Samples with Winton and Ross lead numbers showing slight variation. 



State. 



Ohio 



Do 



Vermont 



New York 



Ohio 



Do 



Do 



Pennsylvania 



Do 



Do 



Do 



West Virginia 



Serial No. 



6315 

 6318 

 6788 

 7561 

 6313 

 6373 

 6374 

 6882 

 6884 

 6864 

 6872 

 7503 



Lead numbers. 



Winton. Ross. Difference 



3.61 

 3.47 

 3.58 

 2.37 

 3.53 

 2.16 

 2.23 

 3.22 

 2.77 

 3.68 

 3.69 

 4.64 



3.57 

 3.32 

 3.58 

 2.45 

 3.62 

 2 22 

 2.25 

 3.30 

 2.86 

 3.71 

 3.74 

 4.70 



-0.04 



- .15 



.00 



+ .08 

 + .09 

 + .06 

 + .02 

 + .08 

 + .09 

 + .03 

 + .05 

 + .06 



MALIC ACID VALUE. 



The average of all determinations was 0.93, with extremes of 1.72 

 and 0.51. This average is a little below that obtained on sap sirups, 

 1.01, and the extremes are not as far apart as in sap sirups. The 

 results by localities and groups of 0.10 and 0.25 are tabulated in 

 Table XXI. 



Table XXI. — Malic acid value of sugar, by locality. 



Malic acid 



Number of samples. 



Per- 

 cent- 

 age of 

 sam- 

 ples. 



value. 



Ind. 



Me. 



Md. 



Mass. 



Mich. 



jN.H. 



N.Y. Ohio. 



i 



Pa. 



Vt. 



W. 



Va. 



Can- 

 ada. 



Total. 



0.00 to 0.59 



















il 

 3 

 7 

 16 

 14 

 2 



21 



8 

 7 

 26 

 19 

 2 







2 

 26 



59 

 143 

 105 



23 

 4 



0.7 



.60 to .69 





l 

 3 



1 

 5 

 3 

 2 



1 



9 



. 4 



6 

 2 

 12 

 3 



4 

 4 

 4 



3 

 14 

 30 



9 



2 

 8 

 7 



12 

 1 



2 

 2 



2 



9 

 25 

 29 

 14 



1 



7.2 



.70 to .79 



.80 to .99 



1.00 to 1.24 



1.25 to 1.49 



2 



8 

 7 

 2 



16.3 



39.2 



29.0 



6.3 



1.50 to 1.74 

















3 



1.3 



























Total... 



19 



4 



11 



14 



23 



12 



56 3 30 



43 



63 



7 



80 



3 362 



100.0 



i 0.59. 



2 0.51. 



3 One missing. 



The largest number of samples falls in the groups from 0.70 to 

 1.24. Two samples show figures below 0.60, one from Pennsylvania 

 with a value of 0.59, and one from Vermont with a value of 0.51, 

 while in the sap sirup 6 out of the 480 showed values below 0.60, 

 one being as low as 0.21. 



TANNIN REACTION. 



The ferric-chlorid test showed indications of tannin in nearly one- 

 third of the samples, being very strong in 10 samples. In all cases 

 where tannin was noted the color of the sirup was dark, and in most 

 of these the flavor was poor. The fact that tannin was found in a 

 larger number of the sugar-sirup samples than of the sap-sirup sam- 

 ples may be accounted for by the fact that less care was taken in the 

 preparation of the maple sugar than in that of the sap sirup. Many 



