ON LIMONE. 
33 
is remarkable ; concentrated nitric acid dissolves it, especially 
with the assistance of a little heat ; the solution is of a pale 
yellow, and even after long heating it is precipitated by water 
from the solution in an unaltered state. On boiling it with a 
concentrated solution of bichromate of potash it undergoes no 
change, nor with free chromic acid, i. e. sulphuric acid and 
chromate of potash, in which solution it floats unaltered even 
after boiling for several hours. The acetic solution has a 
strong bitter taste ; however, it does not appear to produce 
any considerable physiological effects. 60 millegrammes, 
dissolved in acetic acid and taken early in the morning be- 
fore breaking fast, produced no effect; nothing could be 
detected in the secretions. 25 millegrammes were given to a 
dog, and 10 millegrammes to a bird, but likewise without any 
effect. 
The elementary composition proved the perfect identity of 
the substance prepared from lemon and orange pips, and gave 
as the mean of several analyses, in 100 parts — 
Carbon, 66.09 42 66.17 
Hydrogen, 6.55 25 6.55 
Oxygen, 27.36 12 27.32 
The formula is that of phloridzine, dried at 212° + 2 equiv. 
oxygen. Direct experiments, with reducing agents, such as 
sulphurous acid, hydrochloric acid, sulphuretted hydrogen, 
hydrogen in statu nascenti, and the electric current, afforded, 
however, by their negative results, the proof that this substance 
does not belong to the phloridzine series, especially as the 
characteristic decomposition of salicine by chromic acid was 
wanting. The combining weight could not be ascertained, 
since it was impossible to obtain combinations of this sub- 
stance with other bodies. 
lhidjfrom Gottinger gel. Anz. 
