Mineralogy and Geology. _ 259 
traces of manganese. ‘The presence of this body in the ashes of several 
varieties of tea, coffee, potato, and squash, which has recently been 
demonstrated in the Cambridge Laboratory, leaves no doubt as to the 
source from which the manganese may have been derived. 
The above observations relieve the experiments of Millon,* which 
led him to believe in the existence of manganese in the blood, from 
the imputation of Melsens,t that the metal may have been supplied 
from the vessels or reagents employed in the examination. 
II. MinERALOGY anp GEOLOGY. 
I could not decide on the little | obtained from a specimen which is in 
be Ag of the Garden of Plants. 
ad econdary. ‘ t predominate almost exclusively in the west- 
do Portions (not including Portugal), in the whole of the ancient king- 
Pra of Galicia, and nds through Astorga, Zamora, Salamanca, 
acencia, Caceres, Mérida, Lleréna, Aracé Rio Tinto, to the 
Horth of Seville and to the neighborhood of Italica, the birth-place of 
the Emperor Trajan, now called Sancti Ponce. m owever be 
hat a for want of detailed observations, we have no 
ite Ve can say only that the gneiss rocks occupy abouta fifth of the 
vce of the soil, extending longitudinally from north to south, but 
: throwing out, as it were, ramifications toward the east. 
___ * Journal de Ph. et de Chim, 3 Sér, t. xiii, p. 86-88. 
Ann, de Chem. et de Phys, 3 Sér, t. xxiii, p. 388-392. 
ae 
