294 
side of the lesion, to which association fibers 
were traced directly from the lesion. This 
distribution of association fibers to the con- 
volutions of the two hemispheres was quite 
symmetrical, and by far the greater number 
passed to that portion of the opposite hemi- 
sphere which corresponded to the situation 
of the lesion. In addition to these associa- 
tion fibers a large portion of the degen- 
erated tract crossing in the corpus callosum 
turned down into the internal capsule of 
the opposite side. These fibers mostly ter- 
minated in the thalamus and hypothalamus, 
but in a number of instances a few of these 
fibers passed on through the pons and me- 
dulla inte the cord. Owing to the degen- 
eration in both pyramids above the decus- 
sation, it could not be determined whether 
or not these fibers recrossed in the decus- 
sation. Dr. Mellus stated that after uni- 
lateral lesions in the brain of the dog he 
had found fibers crossing in the corpus 
callosum and passing down the internal cap- 
sule of the opposite side. In no instance, 
however, had he found these fibers in the 
dog passing through the capsule. They all 
passed out of the capsule and ended in the 
thalamus of the side opposite the lesion. 
Methods of Statistical Study in the Dissecting 
Room with special reference to the Peripheral 
Nervous System: Dr. BARDEEN. (Illustra- 
ted by charts. ) 
Discussed by Dr. Huntington. 
Wandering of the Skin during Development, in 
Relation to the Distribution of Cutaneous 
Nerves: Dr. Harrison. (Illustrated by 
diagrams. ) 
By a process of transplantation, embryos 
of two species of frogs may be combined, 
and through contrast in pigmentation, wan- 
‘dering of the epidermis may be accurately 
observed as the embryo develops. There 
is a definite relation between this move- 
ment and the course of the cutaneous 
nerves in the adult. The wandering of the 
SCIENCE. 
[N.S. Von. XIII. No. 321. 
skin is, at least to a great extent, passive, 
and is due to mechanical causes. 
Intrinsic Blood Vessels of the Kidney and their 
Significance in Nephrotomy: Mr. Max 
Bropet, Baltimore. 
The pelves of most kidneys are on the 
posterior part of the hilum and pass ob- 
liquely forward to the center of the kidney. 
The calices are grouped in two rows, an- 
terior, pointing forward, and a posterior, 
pointing laterally. The arteries usually 
divide into two main trees, an anterior, 
carrying three-fourths to four-fifths of the 
blood, and a posterior furnishing the re- 
mainder. There is neither anastomosis nor 
crossing between the branches of these two 
trunks; they are completely separated by 
the pelvis and its calices. The superficial 
and deep collecting veins of the cortex 
empty into the venous arches at the base of 
the pyramids, forming the peripheral sys- 
tem of venous anastomoses. There is, how- 
ever, a second more central system around 
the necks of the calices. Practically all 
the veins at the hilum pass anteriorly to 
the pelvis. ‘The form of the pyramids and 
their relations to the blood vessels and sur- 
face, and also the columns of Bertini, have 
been studied. Although many kidneys 
deviate in their construction, all conform 
more or less to the rules mentioned. The 
studies reveal several points of interest to 
the surgeon, among which are: (1) The 
most advantageous incision for nephrot- 
omy. (2) The appropriate method of sutur- 
ing an incised kidney. (38) A very satisfac- 
tory method of fixing the kidney. (4) The 
insufficiency of the method of opening the 
pelvis at the hilum. 
Histology of the Endometrium : Dr. T. S. Cut- 
LEN, Baltimore. (Illustrated by speci- 
mens and drawings. ) 
The Architecture of the Gall-bladder: Dr. M. 
T. Super, Baltimore. (Read by title.) 
