3% | the dry
" " " Mapiri and Yungas | leaves.
1 year old 0.3% |
" " " Cuzco " " " 0.2% |
" " " Mapiri and Yungas |
2 years old 0.15%/
Coca leaves from Yungas and Cuzco, three years old, contained no trace
of the alkaloid, whereas fresh green leaves from Yungas contained 0.7
per cent. of the weight of the dry leaves. The same process is also
applicable for the manufacture of quinine from poor quinine bark, with
the single alteration that weak sulphuric acid must be used for the
neutralization of the alkaline petroleum extract.--_H.T. Pfeiffer,
Chem. Zeit. 11._
* * * * *
[Continued from SUPPLEMENT, No. 622, page 9941.]
THE CHEMICAL BASIS OF PLANT FORMS.[1]
By HELEN C. DE S. ABBOTT.
The succession of plants from the lower to the higher forms will be
reviewed superficially, and chemical compounds noted where they
appear.
When the germinating spores of the fungi, _myxomycetes_, rupture their
walls and become masses of naked protoplasm, they are known as
plasmodia. The plasmodium _AEthalium septicum_ occurs in moist places,
on heaps of tan or decaying barks.
Pages:
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134