VI 
CONTENTS. 
V. A Catalogue of the Fifty Plants , from Chelfea 
garden , prefented to the Royal Society, by the Wor- 
jhipful Company of Apothecaries for the Tear 1771, 
purfuant to the Direction of the late Sir Hans 
Sioane, Bart. M. I). Soc. Reg. nuper Prafes : 
By Stanefby Alchorne, Member of the faid Society 
-of Apothecaries in London. p. 30 
VI. ExtraCi of a Letter from Mr. Ebenezer Kinnerfley 
to Benjamin Franklin, LLD. F. R. S. on feme 
eleClrical Experiments made with Charcoal. p. 38 
VII. Account oj an Experiment made with a Ther- 
mometer , wkofe Bulb was painted blacky and expofed 
to the direct Rays of the Sun : In a Letter from 
Richard Watfon, D. D. Regius Profefjor of Divi- 
nity at Cambridge, and F. R. S. to Mathew Maty, 
M. D. Sec. R. S. p. 40 
VIII. A Report of the Committee appointed by the 
Royal Society , to conjider of a Method for fecuring 
the Powder Magazines at Purfleet. p. 42 
IX. Obfervations upon Lightning , and the Method of 
fecuring Buildings from its Effcds : In a Letter to 
Sir Charles Frederick, Surveyor -General of His 
Majefey s Ordnance , and F. R. S. By Benjamin 
Wilfon, F. R. S. & Ac, R. Upf. Soc. p. 49 
X. A Letter to Sir John Pringle, Bart. Pr. R. S. 
on pointed Conductors. p. 66 
XI. Agronomical Obfervations made at Chiflehurft in 
Kent ; by the Reverend Francis Wollafton, F. R. S. 
P . 67 
XII. A Letter from Dr. Ducarel, F. R S. and 
F. S. A. to William Watlon, M. D. F. R. S. 
upon the early Cultivation of Botany in England ; 
and feme Particulars about John Tradefcant, a 
great Promoter of that Science , as well as Natural 
Hiftory , 
