34 BULLETIN 466, U. S. DEPARTMENT OF AGRICULTURE. 
TABLE XX.—Samples with Winton and Ross lead numbers showing slight variation. 
Lead numbers. 
State. Serial No. 
Winton. Ross. Difference. 
(OU S o5 5 ee Rae EN 2 8) ON ee ae en ee eee ek 6315 3.61 3.57 —0. 04 
LLY ONS ohh pis pet bene) et eek Ae Sa 2a cc en age ty ena et 6318 3.47 3.32 — .15 
VOT TION Gea ee oe ee a a eo ee perne 6788 3.58 3.58 . 00 
ING Wa VOT eee ye ee eee a CRS 8 on eee 7561 PEBY/ 2.45 + .08 
ODS Se IRE aU Ng Tae wr Sar det Sn, Wer ease 6313 3.53 3.62 + .09 
LDC poe ahh pA en tah Pee AI gt ae) go 6373 2.16 222 + .06 
ID Qa e alee Sass Send, Ie ere i, Se pe ee | 6374 225 2.25 + .02 
EGET TEL ES tt 1 ers a te ah lg el al 6882 3. 22 3.30 -- 208 
DYN Sah oe ee Oo ee ee 5 ol eee § aes 6884 2.77 2.86 + .09 
DO Tere eee ea en at Ma eee, 2 Az Lea ee 6864 3.68 Seri + .03 
IDO $n Ge SS Cs ae ee Sime ns Immune Sipemmmer rents Seer 6872 3.69 3.74 + .05 
WViGSGAVATO UTI eee et eee a Ste Se es. Aaa 7503 4.64 4.70 + .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. 
Number of samples. Es 
Malic acid , : age of 
roe. Ind. | Me. | Md. | Mass.| Mich.|/IN.H.|N.Y.' Ohio.) Pa. | vt. | > | C82 |rotal.| S8™- 
. . . . "lk . . . . . . . Va. ada. . ples. 
O00 TO beset eel. k ck (ea ey We SN Ps cc al Reece vo pie i Vel oer Lal. SI 2| 0.7 
EN toun Gomes hits. aiey leas Gales 3 2 3 Sil ea 2| 261) 73 
POCO ETO EE Pe loc. ok 5 i 2 Aleta) | AAS 7 Tul sane 9| 59] 16.3 
‘80 to .99....| 8 3 3 9| 12 AAees0.| Uh 46S pg ee 25| 143 | 39.2 
VTE Gs ja EY te le 2 4 3 4 9| 12] 14] 19 2| 29! 105| 29.0 
DOR OMAR, Fo6|- chal. el cote (5 | SS Fe hs afi 2 2 9|.. 14]. 230i 
EO OME MEE bese ell gl seb S| a ace. ee Eee come 3 1 Al, aes 
Total...| 19 ul aay|| tae) 93 | ao een s'30n| east es 71 80 | 2362 | 100.0 
10.59. 20.51. 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 
