a Scientific Intelligence. * 7 
catalogue is made more valuable to the botanist, as well as to the 
cultivator, wn Dr. Engelmann’s revised and largely new account 
of the True 
from a plant which was cultivated in the Jardin des Plantes at 
Paris, perhaps a hundred years ago, which was also recognized 
as a species by the elder Michaux at the beginning of this cen _ 
tury (for, although unpublished, it exists in his herbarium as V. 
rubra, but was merged by the witer of his Flora in the nearly 
allied V. riparia), he having collected specimens on the banks of 
streams in Illinois. Finally it has been detected by Mr. Eggert 
of St. Louis, on the banks of the Mississippi, above that town; 
and Dr. Engelmann has iv this revision fixed its characters. 
mann, and that he has taken care to publish successive MOnO- — i 
graphical revisions, setting forth his latest additions to the stock — 
of knowledge, which, from first to last, we mainly owe to him. 
A. G 
3. The Law of Heredity: A Study of.the Cause of Varia- 
y By W. K. Brooks, — 
Associate in Biology, Johns Hopkins University. Baltimore: Je nS 
Murphy & Co. 8: 
which we hasten to announce rather than to review, is perhaps 
of heredity; we should say rather of the cause or origin of varia — a 
a * ba 
i This is developed and expounded with a great we ; 
illustration. The othesis is woven of the same tenuous mate- 
rial which forms the staple of Darwin’s pangenesis; but 1 
to be better adapted for wear than the original fabric. 
