Letters

SIRS,---It so happened that, after reading the letter on this subject (antea.-p, 140), I had to consult The Gentleman's Magazine (Vol. XIX.), 1749. I t was curious therefore to come across the following (p. 204) : " The Egg of a Swan with another in it. Given by Sir Tho. Brown, M.D., of Norwich, t o the Royal Society, who hath also observed the like both in hens and turkeys." A description follows an...