TRANSACTIONS OF THE SECTIONS. 167 
It is stated by Professor Cooper, in his Surgical Dictionary, that re- 
production of bone in the cranium is rare, and that the deficiency of 
bone is never entirely obviated. A portion of the frontal bone which 
the Author laid before the Section exhibits a trepan-hole completely 
filled up with bone. 
The man from whom it was taken died at forty years of age. “I ob- 
served a conical scar on his forehead, and felt a depression, and in- 
quired its history. When a lad of twelve or fourteen he had got his 
head fractured in a fight, and was trepanned twenty-six or twenty-eight 
years before his death. I found the edge of the trepan-hole well 
marked by a regular depression of about 2rds of an inch, while below the 
depression was irregular, probably from some splintering having taken 
place in that direction. The bone which fills up the hole is compact 
and translucent, except at lower part, where it is thickened, and pro- 
jects a little internally. The mark is just above the upper termination 
of left frontal sinus, and in situation of frontal eminence, which is de- 
stroyed by it. ‘This preparation, of course, settles the question of the 
complete filling-up with bone in the affirmative.” 
On the Vital Statistics of Scarborough. By Joun Dunn, Surgeon. 
As Scarborough is the principal watering-place in the North of En- 
gland, it is of great importance to know accurately the prevailing causes 
of death, their relative proportion, the least and most healthy periods 
of the year, the ratio of mortality according to age, the climate as to 
temperature, variation, atmospherical pressure, fall of rain and prevail- 
ing winds. These are illustrated by tables, proving among other points 
that the deaths from typhus and scarlatina are very low, the former 
being as 4 to 11°64 of the same mean population of the kingdom. As 
to pulmonic diseases, so generally dreaded on the sea-coast, the author 
observes, “It is a gratifying, and in some measure an unexpected fact, 
that diseases of the respiratory organs, so fatal in general, do not bear 
so large a proportion in Scarborough to the general mortality as in the 
mean population of the whole kingdom. With us they amount to 1 
in 5:09 of the whole deaths, in the kingdom they form the prodigious 
number of 1 in 3°67. The relation to the number of inhabitants is 
also in our favour, being 1 in 197-91, while in the mean population of 
the kingdom it is 1 in 181°65. With respect to consumption a remark- 
able fact must be noticed, that only 5 cases are registered in the month 
of March for the three years, and 4 for April; it must be further ob- 
served, that in the first year there is but one death in March from 
this cause, and none in April, either of the first or second years. In- 
stead of the spring months being so fatal to phthisical people, it appears 
that the greatest number of deaths took place in July, the hottest month 
of the year.” 
“As to the chance of attaining longevity at Scarborough,” Mr. Dunn 
states, that, “In every 1000 deaths in the whole kingdom there are 145 
at the age of 70 and upward; in the same number in London 105, 
