COMPOSITION IN SUCCESSIVE STAGES. 207 
On dividing the above quantities by the number of days 
of the respective periods, there results: 
The Average Daily Gain or Loss per Acre during 
each Period. 
Taste IV.—Br. 
“Dry Matter, — Water, 
Ast Period, 22 Ibs. Gain. 87 lbs. Gain. 
8d iT 163 “ “ce 882 iT? sy 
4th “ 6 « « 167 ‘ Loss. 
5th ‘13 112 “ iT 447 iT) “ 
4.—Table II, and especially Tab. IV, show that the gain 
of organic matter in Bretschneider’s oat-crop went on 
most rapidly at or before the time of blossom, (according 
to Arendt at the time of heading out.) This was, then, the 
period of most active growth. Afterward the rate of 
growth diminished by more than one-half, and at a later 
period increased again, though not to the maximum. 
Absolute Quantities of Carbon, Hydrogen, Oxygen, 
Nitrogen, and Ash, in the dry oat crop at the conclusion of 
the several periods; (bs. per acre.) 
TaBLeE YV.—Br. 
Carbon. Hydrogen. Ozxygen. Nitrogen. Ash.* 
Ist Period, 598 80 455 46 110 
Sa“ 2,137 286 1,575 122 268 
4th « 2,600 343 2,043 150 201 
Sth « 3,229 405 2,713 167 372 
Relative Quantities of Carbon, Hydrogen, Oxygen, 
Nitrogen, (Organic Mattier,) and Ash in the dry oat crop, 
at the end of the several Periods; (per cent.) 
Taste VI.—Br. 
Carbon. Hydrogen. Ozxygen. Nitrogen. (Organic Matter.) Ash. 
1st Period, 46.22 6.28 35.39 3.59 91.43 8.57 
3d 48.76 6.53 35.96 2.79 94.04: 5.96 
4th “ 47.91 6.33 37.65 2.78 94.67 5.33 
Sth “ 46.89 5.88 39.40 2.48 94.60 5.40 
* In Bretschneider’s analyses, ‘“‘ash” signifies the residue left after carefully 
Durning the plant. In Arendt’s investigation the sulphur and chlorine were de- 
termined in the unburned plant, 
