C 815 ) 
Beginamg the Thirtemkye4r. 
PHILOSOPHICAL 
TRANSACT10N& 
March 25. 1677. 
The CONTENTS. 
ihe Preface to the Thirteenth year of thefe traits. Some Oh- 
fervatiom and Advertifeme/$ts, tending to improve Gardens 
and other Land, Obfervationsconcerningvariom little Ani- 
mals ^ in great numbers difcoverd by Mr. Leewenhoeck in 
Rain' Well* Sea^ and Snow-rvater ^ as alfo in water wherein 
Pepper had lain infufed. Some new Obfervations made by 
Sigmr Caffini concerning the two Planets about Saturn , not 
long fince di [covered by the fame. An Account of fome Books : 
1. PHARMACOPOEIA Collegii Regalis Londini-, llCa- 
talogm PLANfARUM ANGLliiM, &c. Edit, fecunda 5 
opera Johannis Rail, M. A/e SocRegia ; III. Aero-Chalinos^ 
or, A Regifler of the jiir , drc. Edit, fecunda : By Nathan, 
Hcnfliaw M. D. Fellow of the Royal Society \ IV. A Philofo* 
fhicalEffayof lA^^ixck. 
J, Preface to March 25. 1677. 
T Rave little to fay for a Preface to this my Twelfth Volume 
\ (yphich by the Divine Affiflance I now begin: ) For that fo 
fnany of the chief Universities in Chriliendom have already form- 
ed themfelves into Philofophical Societies ^ and haiy€ fo largely 
contributed their Ajdes to advance the Lord BdiConsDeJignfor th& 
Infiauratton of Arts and Sciences ^ that it is now become above my 
abilities to direSl orpropofe thofe rare and excellent things^ which 
$re fuggefiedtomany worthy Authors by their own happy Geniw. 
5 p Many 
