are te E 
1884. ] Renumeration of the Spinal Nerves, etc. 379 
grow vertical from that time (and point) upward, and at maturity 
shows the curve and tangent as in Fig. 11. 
Nearly all the trees growing on the down-stream end of bot- 
toms, show the lean as in Fig. 11, and some show the bend at the 
bottom. The young trees, at ten years, show very little inclina- 
tion as compared with the grown and old ones. 
I saw a case in the north-east part of Brown county, before 
inentioned, on the south side of Jesse Walker’s farm (section, 
township and range forgotten), where a “worm” rail fence had 
been built on the south boundary line across the bottom of a 
small stream or brook, the bottom not over 300 feet across. The 
fence had been built straight, and about eight rails high. The 
sediment carried from the fields on the adjacent hills during rains, 
was caught by the grass and so silted up that the bottom rails 
Were submerged. The proprietor kept adding rails to the top as 
fast as they were submerged at the bottom, so as to keep-the 
necessary height of fence. This continued about fifteen years, 
when the original eight rails had been entirely covered or sub- 
merged, when it was noticed that the fence had been swayed 
down stream about four to five feet from the original straight line. 
The sedimentary deposit had certainly moved like a glacier. 
This coincides with the other facts before stated. 
In conclusion, the drift was deposited here by the waters from 
a receding glacier. The general course of the flow, as indicated 
by the striations, was about south 1 5° to 18° west. If my theory 
‘S correct, the tendency of the deposit of the drift would be to 
slide southward. I do not wish to be understood as confidently 
affirming the correctness of my theory, but that the slope of the 
hills, the lean of the trees on south-facing hills, taken in connec- 
tion with the other facts I have cited, strongly suggest my theory 
às the explanation of the facts. If this theory does not explain 
the Phenomena, what other does? Are there any well-established 
facts which contradict this theory? If so—what ? 
A’, 
Ve 
RENUMERATION OF THE SPINAL NERVES AND 
RECONSTRUCTION OF THE PLEXUSES 
IN THE HUMAN SUBJECT. 
BY DR. ELLIOTT COUES. 
THERE being a pair of spinal nerves to each vertebral inter- 
Space down to the coccyx, and the pair counted first being 
