COMPOSITION IN SUCUESSIVE 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. 
TaBLE IV.—Br. 
Dry Matter. Water, 
1st Period, 22 ibs. Gain. 87 Ibs. Gain. 
3d 46 163 “ “6 882 6c Ty 
4th “* Gol 7s 167 ‘* Loss. 
5th “ce 112 “ce “ 447 «eo “ 
4.—Table III, 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; (dbs. per acre.) 
TaBLE V.—Br. 
Carbon. Hydrogen. Oxygen. Nitrogen. <Ash.* 
1st Period, 593 80 455 46 110 
3d a 2,137 286 1,575 122 263 
4th ‘* 2,600 343 2,043 150 291 
Sth = % 3,229 405 2,713 167 372 
Relative Quantities of Carbon, Hydrogen, Oxygen, 
Nitrogen, (Organic Matter,) and Ash in the dry oat crop, 
at the end of the several Periods; (per cent.) 
TaBLE VI.—Br. 
Nitrogen. (Organic Matter.) Ash. 
Carbon. 
1st Period, 46.22 
tal Es 48.76 
4th “ 47.91 
mute St 46.89 
Hydrogen. Oxygen. 
6.23 35.39 
6.53 35.96 
6.33 37.65 
5.88 39.40 
3.59 
2.79 
2.78 
2.43 
91.43 
* In Bretschneider’s analyses, ‘‘ash”’ signifies the residue left after carefully 
burning the plant. In Arendt’s investigation the sulphur and chlorine were de 
termined in the unburned plant. 
