IV. Art Addition to the Defcription of the Art of 
Living under Water, publi ft) d in PhiL Tranfadh 
No. 349. % the fame. • 
V. An % Account of an Aurora Borealis, obferved 
at Dublin, on Monday the fixth of February 
1720-1* By J. W. 
.. . * „ * „ . • » . ' m r 
V . l. ./t,, ‘ '• • . N -if • j - . h 
VL A Defcription of an Aurora Borealis, feen 
on the fame Day at Cruwys-Morehard, in. 
Devonfhire. 'By Samuel Cruwys, Efy F.R.S. 
, (' i t r ±. vi 1 ri Ks %.j 
VIT. ObferVations on the Mufcular Fibres of Fifb . 
By Mr. Leeuwenhoek, R R. S. 
VIII. ObferVations upon the Seeds of Flantsl, By 
the fame. Tranflated by John Chamberlayne, 
Efa 
' • 1 ' ' 
IX. Ext raB of a Letter from Dr. Brook Taylor,. 
R R. S. to Sir Hans Sloan, dated 25* June., 
17)4. Giving an Account of Jome Experiments 
relating to Magnetifm , „ 
