[ ] 
Cafes of Conception is the Pathognomonic S ign of 
iomething preternatural) her Breafts, (he concluded 
her Menfes were leaving her at their ufual Period. 
But, upon the Firft of April , being taken with great 
Pains in her Back, and having other Symptoms ante- 
cedent to Delivery, there came away, at fhort In- 
tervals, a very large Number of Hydatides^ of all 
the intermediate Sizes, from a Nutmeg to a Pin’s-head, 
fome filled with clear, others with bloody Lymph ; all 
of them propagated in the manner of a Clufter of 
Grapes from a fpongious Subftance, anfwering the Pur- 
pofes of a Placenta. After the Difcharge of thefe, 
in a few Days fhe recovered her accuftomed Health. 
Upon boiling fome of thefe Hydatides , they ap- 
peared like the Ovary of a boiled Hen y with this Dif- 
ference ; in the Hen y the Contents of the Ova con- 
crete $ in this Cafe, not; but the Tranfparency was 
changed to the Colour of Bile diluted with Water. 
XII. T wo Medico-Chirurgical Obfervation$ y 
ly Monjieur Le Cat : Communicated in a 
Letter to Mr. Serjeant Amyand, dated at 
Rouen, Feb. t o. 1740. N.S. Translated 
from the French by T. S. M* 2 ). F* R S. 
1. An Ohfervation on Hydatides, with Conjectures 
on their Formation . 
FEptember 21.1739. a Woman died in our Hotel- 
*** P)ieu y who had an Abfiefs in the Right Hypochon- 
■drium, through which fhe difcharged Hydatides ; 
with 
