XXX CUO; NUE 74s) 
Ne Page. 
XI. Account of an Eleftrical Eel, or the Torpedo of Surinam, 
by William Bryant, £/g. 166 
XUI. Obfervations on the Numb Fifb, or Torporific Eel; by Hen- 
ry Collies Flagg, of South-Carolina, 170 
XIV. 4 Letter to David Rittenhoufe, E/fq. from John Page, E/y. 173 
From David Rittenhoufe, E/g. to John Page, E/g. 175 
Concerning a remarkable Meteor feen in Virginia and Pennfylvania. 
XV. Defcription of the Grotto at Swatara, by the Rev. Peter 
Miller, of Ephrata ; communicated by William Barton, E/g, 177 
XVI. An Account of fome Experiments on Magneti/m, in a 
Letter to John Page, E/y. at Wilkamfburg, from Mr. Ritten- 
houfe, 178 
XVII. New Method of placing a Meridian Mark, in a Letter 
to the Rev. Dr. Ewing, Provoft of the Univerfity. By D. 
Rittenhoufe, E/g. 181 
XVIII. Account of a Worm in a Horfe’s Eye, by F, Hopkin- 
fon, E/q. 183 
XIX. An improved Method of Quilling a Harpfichord, by ¥. 
Hopkinfon, E/7. 185 
XX. Obfervations on a Comet lately difcovered; communicated 
by David Rittenhoufe, Z/q. 195 
XXI. Extraé of a Letter from the Rev. Jeremy Belknap, con- 
taining Obfervations on the Aurora Borealis. 196 
XXII, 4 Letter from J. Madifon, E/7. to D. Rittenhoufe, £/7. 
containing Experiments and Obfervations upon what are com= 
monly called the Sweet Springs. 197, 
XXIII. 4 Letter from the Rev. Jeremy ware on the preferv- 
ing of Parfnips by drying. 199 
XXIV. An Optical Problem, propofed by Mr. Hopkinfon, and 
folved by Mr. Rittenhoufe, 201 
XXV. 4n 
