CONTENTS. 
The Laws of Morton of a Cyirnver, compelled by 
the repeated Strokes of a FALLING Buocx fo penetrate 
an Osstacce, the Refiftance of which is an invari- 
able Force. By Mr. Joun Goucu.—Com- 
municated by Dr. Home. - ps; 292. 
Sketcu of the History of Sucar, im the early 
Times and through the middle Ages. By Witt1am 
Fartconer, M. D. F. R. S.: &e. &e.—Com- 
municated by Dr. Percivat. Read March 12, 
i7g0.) - ~ p- 2g. 
Copy of a Letter from "Tuomas Beppors, M. D. 
Phyfician at Briftol Hot Wells, to Mr. 'THomas 
Henry, F. R. S. &e. - p- 302. 
Some Oxservations on the Fiints of Cuarx-Beps, 
in aLetter from Tuomas Bepvors, M. D. Phy- 
fician at Briftol Hot Wells, to Mr. Tuomas 
Henry, F.R. S. &e. - =: Po 3am 
EXPERIMENTS 
