748 
FACTS AND OBSERVATIONS. 
theory of nervous conduction with the hitherto more gene- 
rally received hypothesis of distinct nerve-conductors, sup- 
posed to exist for each kind of sensation, pain, heat, tickling, 
&c., and attempted to point out that the former is at once a 
simple hypothesis, and more in harmony with the ideas now 
prevalent as to the propagation of light, heat, electricity, &c. 
The author also dwelt upon many points of analogy between 
the absorption or interception of waves of heat or of light, 
and the somewhat similar phenomena as regards nerve- 
conduction where one kind of sensation is felt and another 
ceases to be any longer perceived, as in cases where the 
patient feels the contact of the hand, but cannot distinguish 
heat, or vice versa. — Ibid. 
Regeneration of Bone by Periosteum. — M. Ollier's 
recently reported cases seem to prove the fact of regenera- 
tion of the bones through the periosteum. The two cases died, 
but a sufficient time after the operation to show the advan- 
tages of the remedy. Both were cases of resection of the 
elbow-joint. One died eighteen months and the other a year 
after the operation. — The Monthly Microscopical Journal. 
Decrease in the Importation of Wool into Liver- 
pool. — According to returns just made, it appears that 
during the month of July last, there were imported into 
Liverpool the following quantities of sheep's w 7 ool, namely : — 
From the East Indies, 1969 bales; from Spain, 1 bale; 
from Portugal, 277 bales; from Peru and Chili, 5191 bales; 
from the River Plate, 410 bales ; from the Mediterranean, 
2196 bales; and sundries, 52 bales — making a total of 
10,076 bales. There were also imported 200 bales of alpaca, 
and 2373 bales of goats' w r ool. During the seven months 
ending July, there were imported from Australia iyi8 bales 
of sheep's wool ; from the Cape of Good Hope, 34 bales ; 
from the East Indies, 16,369 bales; from Spain, 82 bales; 
from Portugal, 4494 bales; from Peru and Chili, 21,078 
bales ; from the River Plate, 487 1 bales ; from the Mediter- 
ranean, 6729 bales; from the United States, 53 bales; and 
sundries, 139 bales. There were also imported during the 
same period, 15,503 bales of alpaca, and 7518 bales of goats' 
wool — making a total for the seven months of 78,788 bales, 
which, when compared with the corresponding period of last 
year, show a decrease of 20,042 bales. — Journal of the Society 
of Arts. 
TheHogCropof 1870. — The first estimate of theprobable 
number of hogs available for slaughter in the packing season 
of 1870-71, is furnished by the official tables of £he State 
Auditor of Ohio, the assessors of the State returning the 
