PHILOSOPHICAL 
TRANSACTIONS. 
Monday, Novemb. 16. i66$ e 
The Contents. 
An Account from Briftol of fome obfervations made in Hong- 
road this frefent year, by my of Anfwer to feme of the Que- 
ries concerning the Tydes , recommended N°. 17. N°. i8 9 
An Extraltof a Narrative communicated frm Sevill, of ob- 
fervations made in a late Voyage from Spain to Mexico, concern- , 
ing the Minerals of Mexico , and f articular ly the exalt and 
ferfeff way of fefarating the Silver from its Ore by Mercury, 
together with divers other Curie ftties. Natural and Chymicah 
Continuation of Dr. WallisV fec&nd Letter on the frinud Paper 
of Francifcus Dn Laurens. An Account of two Books : 
I. Tra&atus duo, frm de RES P IK AT ION Er* alter dt 
RAC HlTlDE, A.fOH. MAYO W, &c. Oxon. 
1668. in 8°. II. A Difcourfe concerning PHYSIC K 7 
and the many Abufes thereof by APOTHECARIES* 
London, 1668. in 80« 
An Account of feme obfervations^ made this frefent year by Caft. 
Samuel Sturmy in Hong-road within four miles 0/ Briftol , 
in Anfwer to fome of the Queries concerning the Tydes , in 
N°.i7&N°. x8. 
i # r Have obferved, that our ^^4/Spring- Tydes do happen 
J in March and September, either at the Tyde next be- 
fore the Suns Ingrefs into the v£quino£Hd points of Aries and 
Yyyy Libra* 
