XXXil CON *E N TS. 
NO 
Philadelphia, by William Wright, M. D. of Trelawney in 
jamaica, 
XXXVII. Medical Hiftory of the Cortex Ruber, or Red Bark; 
communicated to John Morgan, M. D. Prefeffor of the Theory 
and Pra&tice of Phyfic at Philadelphia, and F. R. S. London, &c. 
XXXVIII. 4 Letter from Dr. Benjamin Franklin to Mr. Al- 
phontus le Roy, Member of feveral Academies at Paris, con- 
taining fundry Maritime Obfervations, 
XXXIX. Account of two Hearts found in one Partridge, 
XL. Conjeftures concerning Wind and Water Spouts, Tornados 
and Hurricanes. Communicated by Dr, John Perkins, of 
Bofton, to John Morgan, M. D. &e. Se. 
XLI. The whole Procefs of the Silk Worm, from the Egg to the 
Cocon ; communicated to Dr. John Morgan, @c. at Philadel- 
* phia, in two Letters from Meffrs Hare and Skinner, &c. in 
London, Fuly 27, 1774, and February 24, 1775, 
- XLIL. The Art of making Anatomical Preparations by Corrofion. 
By John Morgan, M.D. Ge. &e. 
XLII. Of a living Snake in a living Horfe’s Eye, and of other 
unufual Produétions of Animals. By John Morgan, M. D. 
F. R. S. London, &c. 
XLIV. Some Account of a motley coloured, or pyed Negro Girl 
and Mulatto Boy, exhibited before the Society in the Month of 
May, 1784, for their Examination, by Dr. John Morgan, 
from the Hiftory given of them by their owner Monf. le Val- 
lois, Dentifi of the King of France, at Guadaloupe in the 
Weft-Indies, 
XLV. Extraé& of a Letter from Bernard Romans, of Pen/acola, - 
dated duguft 20, 1773, on an improved Sea-Compa/s, 
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