Prof. Norton on the Analysis of the Oat. 229: 
4. Comparative View of the Composition of the Ash from 
the Leaf, Stalk, Oat, Knots, and Chaff, on the 16th of July. — 
Tasre IX. 
Leaf. | Stalk. | Knots. Chait. | Oat. 
Potash and soda, .. 18-35 42-43 | ~ 30-2 15°39 31:37 
Chiorid of sodium,  . 0:30 4-46 0-60 2-01 “61 
ime, SH Re 5:13 4:12 4-75 4-58 ‘76 
Magnesia, “sige td 1-63 1:47 4:51 3:10 2:94 
Oxyd of iron, 2 0-55 0-62 1-02 1:50 35 
Sulphuric acid, . . 13-05 7:84 27-94 9-90 16:42 
Phosphoric acid, . 2-91 6:31 9-03 7 26 15°19 
lica, es erp eal easigic 68-22 34: 13-23 5638 | 26:05 
10014 | 100-33 1700-29" | 100-12 | 99-69 
On the 16th of July the plant was in the midst of its most rap- 
id growth, and just half-way between the time when it appeared 
above ground in June, and when it was cut on the 3d of Septem- 
r. In a subsequent table will be found a comparison of the 
ash from these parts of the plant when fully matured. 
5. Organic Constituents of the Unripe Plant.—In connexion 
with the first chapter of my subject, I have hitherto said nothing 
of the organic constituents of the unripe plant. Mr. Fromberg 
has determined the nitrogen in the unripe oat at six periods of 
its growth, and also when it had become fully ripe. The follow- 
ing table gives his results. 
Tasre X. 
j July | July 
16. | 30. 
Per centage of nitrogen in undried oat, 0-51) 0-51 
Do. do. in dried oat, 1-71) 135 
Do. do. of protein com: ' nds in on- 
dried oak Bee ’ puis 3.24| 3- 
Do. of do. in dried oat, . (10-75) 8-50 
Il. Or roe Rive Pwanr. 
‘It now remains to consider the plant in a state of maturity, 
both as to its inorganic and its organic constituents. ‘To the in- 
organic part I shall first direct attention, and here, as in the first 
chapter, I shall take up different portions of the plant in suc- 
cession. — . 
on. 
1. Of the Ash yielded by the Straw.—tIt has been shown by 
Bowe Johnston,* that hie ash from the straw of all the corn 
* See his Elements, p. 44. 
