Botany and Zoology. - 71 
The power of Europe and Asia in moving the pole is partly due 
to the extension of this continent along the parallel of 45°, which 
is the most effective latitude. 
Samarskite of North Carolina.—A letter to one of the 
editors, from J. Lawrence Smith, dated Louisville, June 15, states 
a few tenths of one per cent.” And that he has discovered a new 
method of separating thoria from the mixed earths, easily used, 
and giving accurate results even when the amount present is very 
small, : 
fetallic acids of the tantalic group_---------- 54°96 
Oxide of tin 0°16 
Oxide of uranium 9°91 
Oxide of iron : 14°02 
Oxide of manganese 1 
Oxide of cerium (La, Di) 517 
Yttria 12°84 
Magnesia 0°52 
Insoluble residue from the oxalate of cerium... 1°25 
] on ignition 0°66 
The loss was determined on another sample of the mineral. 
‘ Ill Borany AND ZOOLOGY. 
the genus Cladophoru. Instead, ho 
pores as is the case with species of Cladophora, the upper portion 
of the cells swells and the contents pass into the swollen portion, 
faving the rest empty. A cell wall is then formed, cutting off 
os Swollen portion from the rest, and the spore is thus form 
eas foreigners who read Swedish, or to the imperfect adapta- 
ity of Latin to modern scientific writin 3 
