(1187) 
there 3 or fuch as had been unfufpsiSled of tke proximity of 
Iron. 
It were well to obferve, Whether the Declination, which 
almoft through all Eurofe hath been Eaflward^ be now eve- 
rywhere Wefiwardf As alfo , Whether in America^ where 
the Declination was almoft everywhere Weflward^ it be in- 
creafed or no proportionally 5 and fo of other parts of the 
World < Noting withall the Year whicli is not at all mind- 
ed by fome, who relate the Obfervations> without aflfigning 
the Year, in regard it will be very ufeful^to know the prefent De- 
clination 5 and it might be put in Journals, for Navigation^ and 
fortheufeof Magnetick C^adrants. 
So far this Relation: In furjmnce of which ^ Order hath been 
given hj the Royal Society , that precife Meridians he made 
infeveral f laces of England > for obferving the prefent De- 
clination of the Needle from thm j here in London, 
other Cities of this Kingdom : And that even thofe Meridi- 
ans, th At were made very exactly many Tears /go . be ex- 
amined bj a earefd defcrihing of netv ones , to fee whether 
they ftiH hold true , in regard of the ff^ffcSted alterations in 
Nature, 
if an) fhall inquire after the Manner of finding the Varia- 
tion of the Needle^ he will find feveral wajes of doing it ^ 
accurately , both by Sea and Land ^ />Numb. ^4. of thefe 
TraBst, where alfo the great ufefulnefs of making exaff 
obfervations of this kind^ is taken notice of ^ both for the 
dtfcovery of the true Caufe of the Magnetos Verticity i 
md for the finding the Longitude at Sea, 
