[(^23 ] Nnmb. \6t. 
PHILOSOPHICAL 
TRANSACTIONS. 
'july zo 1684. 
- The CONTENTS 
I, J Letter fromDuhVm to the Publiflier of thefe TraSls^ 
concerning the Porphyry Pillars in Egypt. 2, A Let- 
ter from the Learned Marcellus Malpighius, to Dr. 
Spon Prefejfor of Anatomy at Lyons concerning the 
firuBure of the Womb , 6cc. 3. A Letter from the 
Learned and Ingenious Maurice Wheeler M. A. and 
I{e£lor of Sibbertoft in Northamptonfhire , to the 
Publiftier of thefe Trails, concerning a Movement that 
meafures time after a peculiar manner^ rvith an Account 
of the IReafons of the faid Motion, 4. An Account 
of fome Experiments to be made relating to Land 
Carriage : propofed by the Learned Sr^ William Petty 
Knight. An account of a Bool^. Chriftiani Huge- 
nii ASTligSCOPIA COMFENDIAKJA Tubi optici 
« molimine liber ata. Or the defcription of an Aerial 
Telelcope. at theYi^ignQin^arto i6%j\.. 
F 
A Let- 
