AGRICULTURAL EXPERIMENT STATION. 





The percentages of "starch" by the acid method are greatly but 

 quite uniformly larger than by the diastase method, this excess 

 ranging between 10.93 to 13.03 per cent of the total substance of 

 the plant, or from 24.5 per cent to 31 per cent of the nitrogen-free- 

 extract. 



This uniformity of difference in the two methods, while proving 

 nothing, is certainly favorable to confidence in the approximate 

 accuracy of the diastase method, especially where the results range 

 from 2 to 18 per cent. If, for instance, the low percentages of 

 starch in the case of samples CLX CLXr, CLXX and CLXXVI 

 and the high percentages in the other samples were due to the less 

 perfect extraction of starch in the former, this fact would be dis- 

 closed by an increased excess with the acid method. As a matter 

 of fact the acid method shows an excess only .36 per cent larger 

 with the samples low in starch by the diastase methed. Moreover, 

 Mr. Bartlett's report shows that an increase in the time of the action 

 of the diastase beyond a certain limit failed to produce higher 

 results, which makes it improbable that an undissolved residue of 

 starch still existed. 



The percentages of sugar and starch in all the samples analyzed in 

 1892 and 1893 appear in Table XV. In Table XVI are the averages 

 for the immature Southern Corn and the mature Maine Field Corn. 



TABLE XV. 

 PERCENTAGES OF SUGARS AND STARCH IN THE WHOLE CORN PLANT. 



Crop of 1892. 



Parts in 100 of water-free 

 substance. 



3 

 be 



as 



CO 



~ 7. 7c 



-U 



— ~ - z 



13.03 



2.03 



15-06 



:.o.22 



10.60 



2.24 



12.84 





11 88 



18.58 



30.46 



61.46 



11.40 



12.66 



24.0S 



:,-.7i 



- 



3.70 



3.70 



46.64 



- 



3.56 



3.56 



42.84 



- 



18.32 



18.32 



59.31 



- 



17.43 



17.43 



57. !H 



13.34 



_ 



13.34 



51.10 



14.45 



- 



14.4.i 



51.94 



13.50 



9.48 



22.98 



57 ■ S 1 



11.70 



_ 



11.70 





'.'0.43 



2.07 



22.50 



55.50 



'20.60 



4.89 



25.49 



.V.i. 74 



21.06 



5.35 



26.41 



62.52 



16.50 



15.37 



31.87 





z — ' 



J.~- 

 — ,z ~ 



X T -Z 



Southern Corn, immature Field 1. . 



Field 2.. 



Maine Field Corn, mature Field 1.. 



Field 2.. 



Southern Corn, silage from Field 1. . 



Field 2.. 



Maine Field Corn, silage from Field 1.. 



Field 2.. 

 Crop of 1S93. 



Southern Corn, immature Field 1. . 



Field 2.. 



Maine Field Corn, mature Field 2.. 



Maine Field Corn, very immature, 



-cut Ana:. 15th Field 1.. 



Maine Field Corn, cut Aug. 28tll Field 1.. 



Sept. 4th Field 1.. 



Sept. 12th Field 1.. 



Maine Field Corn, mature, cut Sept. 

 21st Field 1.. 



30.0 



20.2 



4H.5 



4ii.li 



7.H 



-.:; 



30.1 



20.. 1 

 27.8 

 39.7 



25.1 



10.5 

 42.7 

 42.2 



50.3 



