C 5155 ) Numb. pr. 
PHILOSOPHICAL 
TRANSACTIONS. 
71* 
The C O N T E N T S. 
A Nen> Experiment of Mr. Boyle concerniffg an EffeH ofthe 
Varying Weight of the At moff here upon fome Bodies in the 
watery Jnggejiing a conjeSure^ that the z/erj/ Alterations of 
the Air in point of Weight may have conjiderable operations 
even upon mens Sicknefs or Healthy An extraS of fome * 
Letters from Dr^ John Wallis to the Tublijker^ concerning 
iheSufpenfion of g^uickfUver ^ well purged of Air ^ much 
higher than the ordinary Standard in the Torricellian Ex* 
periment. An Account of two Bookj I, Obfervations * 
topographical. Morale and Fhy/wlogtcal, made in a Journey 
tirough part of the Low Gouotries, Germany, Italy, and 
FrahcejC^^*. by John Ray, Fellow of the KSociety : where'* 
nnto is added , A brief Account of F. Willoughby Efq% 
his Voyage through a great part of Spain. 11. Bernhardi * 
Vareni M. D. Geographia Generalis , au&a iffujirata ah 
Ifaaco Ncwtono^ e Soc* Reg, An Index for the traUs 
of the Tear 1672, 
Tttt £ 
