502 General Notes. [ May, 
0.39; FeO = 8.33; MnO = 12.13; total 99.86. Sp. gr. = 7.72. 
Hidden! mentions a new locality i in Colorado for phenacite, 
xenotime and fayalite, also another for rutile, emerald and hidden- 
ite (spodumene). A crystal of zircon from Burgess, Canada, gave 
the same author a new plane %P not hitherto observed in this 
mineral, 
BOTANY.’ 
THe Nope oF Eguisetum.—If a section is made lengthy 
through a node of a fertile stem of Hguzsetum arvense, each vas 
cular bundle is seen to divide into two parts, each part uniting 
with a corresponding part of an adjacent bundle to form one of’ 
the bundles of the next internode (Fig. 4.). If the section be 
A 
A. Showing the branching of the bundles at the node, seen longitudinally. 2, a 
horizontal section of a portion of the bundle ring in a node 
made radially through one of the teeth of the sheath or rudimen- 
tary leaves, a bundle is seen to pass down and unite in the 
node with one of the bundles of the stem. Fig. B, a horizontal 
section in the node of a portion of the bundle ring, shows how 
this leaf bundle originates. It is seen that the bundle of the leaf 
is derived, not by a simple separation of a portion of the outer 
phloem, part of the bundle in the stem, but that it originates 
where that bundle begins to divide, and in such a manner that its 
vessels are continuous with the xylem of the divided bundle. 
Each bundle of the stem therefore divides at the node in three 
parts—two lateral portions, each with xylem and. phloem, which 
by rearrangement continue the bundles of the stem, and a central 
part which bends outward into the leaf. 
In Fig. B. bundle 3 has divided, and given origin to the leaf 
bundle a, and two lateral portions, one of which has united with 
half of the divided bundle 4 to form the perfect bundle 3’, the 
other half being ready to unite with half of the dividing bundle 2 
to form a bundle at 2’. A section a very little farther up would 
_ show bundle 2’ completed and bundle 2 in the condition that 3 
now is. As the leaves do not arise quite on the same horizontal 
se _ plane successive sections show the process repeated both to the 
American Journal of Science, March, 1885, p. 249. 
Professor E. 
ee d by CHARLES Bessey, Lincoln, Nebraska. 
