the Physiology of the Egg. - 
A hen, which I kept for some experiments, had its leg broken in 
two parts. The fracture was carefully bandaged ; three days sub- 
sequent to which, several eggs destitute of shells were found on the 
premises. The hen had deposited no perfect eggs, nor were there 
any other birds from which these yolks could have proceeded: 
I therefore conjectured that all the calcareous matter designed 
for the formation of the shell had been employed in the regene- 
ration of the bone. We find a similar Jaw existing in the human 
species. The reunion of a bone fractured during a woman’s 
pregnancy is often delayed until her delivery ; and it is well 
known, that, if the horns of a deer be broken at the rutting 
season, it is incapable of procreating its species.—I remain, dear 
Sir, with great esteem, 
Yours faithfully, 
Joun Ayrton Paris. 
. Westminster, | 
. November 30, 1808. 
232 XII. Some 
