282 Chemical Examination of the 
Sh  (g88 * 
o 2 9 
2 & S35 2 
i=] S- @ ‘ » 
avd em " + i*? 
Baa ISSae | Observations. 
3 aia 2's 
£35 |2/4 
3 35 E san | ast 
= ) ‘ ¥ ' ’ *, 
jes x te 
PS Larger eyes than the preceding, more 
oe a aed Pe 
ora 5 moist, dough of sour smell, color dull. 
Io sae 85 07 F Eyes irregular, hollow eras. moist, | 
4 
brown color, smell strong. 
~ Compact and heavy, very moist, brown, 
greenish, smell sour. Its bad quality is 
{ owing to excess of copper. Longer ba- 
hon F J king might have helped it. : 
ae \ More pasty than the last, hollow, crust 
| separates from the crumbs, green, very 
disagreeable odor, pretty free from ex- 
Sat cess of copper. F 
of 
| 
©} 
| 
@ 
eo 
> 
Brown bread. 
Fine, rather flat, uniform grain, the 
S ‘smell of bran not disagreeable. 
7 274) Muchlighter than the last, oist and 
25T 
—— friable, deeper color, and doughy smell. 
. Doughy, very greasy, sticking to the 
hg Sal knife, numerous large fissures, color very 
17) idem. | 74/25) Sdull, smell of leaven, strong and disa- 
. [soe Much ‘injured by excess of 
copper. | nt Se 
5 Et 
Art. VII.—Chemical. Examination of the Bark of the White 
Birch ; by Owen Mason, of Providence, R. I. 
Wuen residing in the country some years since, I had frequent 
opportunities of observing the extreme combustibility of the exter!" 
bark, or cuticle, of the white birch, (Betula alba,) and its durability, 
when exposed in situations favorable for a speedy decomposition. 
In every swamp where the white birch abounds, there are us “I 
_ Many trees which have been prostrated by the winds, and those 
Ta ee 
