CONTENTS. vli 
Academy degli Apatifti at Florence, and of the 
Etrufcan Academy of Cortona, in Tufcany. p. 108. 
XIII. Some Qbfervations on Swanns of Gnats , par- 
ticularly one feen at Oxford, Auguft 20, 1766. In 
a Letter to Charles Morton, M. D. Sec. R. S . 
from the Rev. John Swinton, B. D. F. R. S. Mem- 
ber oj the Academy degli Apatihi at Florence, and 
of the Etrufcan Academy of Cortona in Tufcany. 
P; IIr * 
XIV. A Dejcription of the Andrachne , with its Bo- 
tanical Characters : By G. D. Ehret, F. R. S. 
p. 1 14. 
XV. FUfiory of a Foetus born with a very imperfetl 
Brain : Fo which is Jubjoined a Supplement of the 
E [Jay on the Ufe of Ganglions , publifoed in Philof. 
Franf. for 1764: By James Johnfton, M. D. 
p. 1 18. 
XVI. Cogitata de Cometis , Audi ore Johan ne Win- 
throp, Apud Cantab. Nov. Ang. Math. & Phil. 
Prof. Hollihano, R. S. S. Communicated by Ben- 
jamin Franklin, L L. D. F. R. S. p. 132. 
XVII. Some Attempts to afeertain the utmoft Extent 
of the Knowledge of the Ancients in the Eaft Indies : 
By Mr , John Caverhill. ' p. 155. 
XVI II. A Computation of the Diflance of the Sun 
from the Earth. By S. Florfley, L L. B. ReClor 
of Saint Mary, Newington, in Surrey, F. R. S. 
r . P* * 79 - 
XIX. Defcripticn of an improved Apparatus for per- 
forming El e Sir i cal Experiments , in which the Elec- 
trical Power is incrcafed , the Operator intircly fe- 
cured from receiving any accidental Shocks , and the 
whole 
