Prof. Norton on the Analysis of the Oat. 227 
fourths of the oat, the per-centage of ash, taking the two to- 
gether, of course diminishes. By reference to Table II, it will be 
seen, that on the 2d of July, just when the oat began to show it- 
self, a sudden decrease took place in the ash of the stalk. The 
per-centage of water in the oats when the crop was cut, on the 3d 
of September, was more than twice as much as I have found in 
those taken from the granary or stack-yard. 
Heretofore I have only spoken of the quantity of ash yielded 
by the several parts of the plant; I now would direct attention 
" the composition of this ash, which will constitute the second 
vision. 
B. Of the Quality of the Ash from the several parts above 
mentioned. 
This series of analysis by Mr. Fromberg, has already involved 
avery great amount of labor, and is not yet by any means finish- 
, extending only over seven weeks of the fourteen, in which 
the determinations of the quantity of ash were made. They ex- 
tend to the 16th of July; and, so far as they go, present a com- 
plete view of the curious and interesting changes which take 
place during the development of the various parts of the plant. 
As before, I will place the leaf first. 
1. Composition of Ash from the Leaf of Unripe Oats at dif- 
Jerent periods of growth. - ar 
Taste VI. 
a “7 June 4. June 11.) June 18.) June 25.{ July 2. duly 9. [duly 16) 
Powsh and soda, . . | 2460 | 23°51 | 26-21 | 26:10 18-78 | 16-09 | 1835 | 
Chlotid of sodium, . | 16.34 | 13:54 | 11-30 | 7:56 | 7-92] 4-09 0:30 | 
ime, . ..  . . | 444-724), 733 | 674] 691) 593) 5-13) 
Magnesia, . . . 5.33| 311 | 347 | 306 | 239] 235) 1-63 
Oxyd of iron, * * | 0961 | 0-52 | 0:72 | 0-99 | 040) 034 | 0-55 
Sulphuric acid, 9. ‘| 11.74 | 1285 | 10-59 | 7-88 | 9'50| 6-45 | 13-05 
Phosphoric acid, . , | 16.16 | 10-57 | 1012 | 876 | 692) G44| 291 
» , 2 2 7 14658 | 28-54 | 30-31 | 36:50 | 47°62 | 58-28 | 58-22 
99-80 | 99-88 (100-05 | 99°59 \100-14 | 99-97 1100.14 
The oxyd of iron seems to have fluctuated in its proportions less 
than any of the other substances. 
