( j8p ) Numh.^o. 
PHILOSOPHICAL 
TRANSACTIONS. 
Monday, Oclob. .19. 1668. 
The Contents, 
I'he Variations of the Magnetick Needle, predicted for many year s 
following. Extra&s of three Letters 5 one, lately written by 
Monfieur De Bills, touching the true ufe of the Lymphatick 
Veflels 5 the fecond,written by Mr. Stafford from the Ikrmu- 
das, concerning Tydes, Whales, Spermaceti, grange Spiders- 
Webbs -j fome Vegetables , and the Longevity of the Inhabitants 
of that If and *j the third-, written from Paris, about the polifh- , 
ing of Telefcopical Glaffes by a Turn-lathe 5 as alfothe making 
of an extraordinary ftuming-glafs at Milan . A Note concern- % 
ing Empty Tubes formerly defcrib'd. obfervations concerning 
Cochineel, accompanied with fome Suggestions for finding and 
preparing fuch like fubfiances out of other Vegetables. Que- 
ries concerning Vegetation, efpecially the Motion of the Juyces 
of Vegetables. Other Queries about the Vfe and Culture of the 
Kitchin-garden and Winter-greens. A fuggeflion for taking 
more notice^ than hitherto hath been done y of the juyces tf Trees, 
by tapping, ' An ExtraEt of a Letter from Br. Nathanael 
Fairfax, about a I^eaden Bullet voided by Vrine. An Account of 
fome Books: I. J. Hevelii CoMETOGRAPHIA. II. Renati 
Des Cartes EPISTOL^/E fermone Latino, III. Scrutinium 
Chymicum VITRIQLI , Auth. Joh. Georgio Trumphio. 
IV. Francifci Dele Boe'Sylvii PRAXIS MEDICiAE Idea 
nova, Lib. I. 
The Variations 
of the Magnetick Needle predicted for many y ear es fol- 
lowing. 
THe Do&rine of the Magnet and Magnetical Motions is yet 
foobfcure, that what hitherto hath been difcourfed and 
written upon that Subjed, proves very unfatisfaftory to Men, 
T 1 1 1 that 
