4.~>fi Bulletin 167 



The moisture content of these sirups showed less variation 

 than has been noted in many of the groups. The average was 

 35.08, with extremes of 38.68 and 33.36^ . 



The sucrose averaged 60.63. with extremes of 57.67 and 

 62.82%. 



The invert sugar averaged 1.35%. Nos. 121, 123 and 125 

 contained but small amounts, which serves to show that in these 

 cases the infecting organism did not act as an invert sugar 

 former. The remaining samples, however, show quite a marked 

 increase, the invert sugar content of No. 127 being 3.06%. 



The total and insoluble ash and malic acid value are well 

 above the standard in ever} - case. 



Group 17. Sour sap, kept. The three samples thus listed 

 were secured in 1910 just previous to the buddy sample No. 88 

 mentioned in table 32. They represent a composite of the small 

 runs during several days toward the close of the season. Tap- 

 holes, spouts and pails were contaminated through the ordinary 

 natural sources, as was indicated by the cloudy appearance of 

 the running sap. The flavor in each case was a poor medium. 

 The color of No. 84 was darker than that of any other sample 

 secured, with two exceptions grading 20, the extreme limit on 

 the colorimetric scheme. Nos. 85 and 86 were even darker than 

 No. 84 and defied grading. An attempt was made during the 

 boiling process to clarify No. 86 by means of the usual white of 

 egg treatment which, in this case at least, was ineffective. 







