(i4i) 
ry of Her , r as may hereafter ferve to build a Solid and Ufeftil 
Philofophy upon y They have from time to time given or« 
der to fevera! of their Members to draw up both Inquiries ©f 
things Obfervafele in forraia Countries , and Dir e& ions 
for the Particulars, they defire chiefly to be informed about* 
And confidering with themfeim, how much they may lit* 
creafe their Philofophical frock by the advantage , which 
England iajoyes of making Voyages into all parts of the 
World $ they formerly appointed that Eminent Mathcma* 
ticks and Philosopher MafterKw^, one of their Fell owes , 
and Geometry Profeffor of Grejfoam Colledge ( oow deceafed 
to the great detriment of t he Common- wealth of Learning) 
to think upon and fet down Some DireUiom for Sea-men go^ 
ing into the Eafl & fVeft-tndies % the better to capacitate them 
for making fuch obfervations abroad, as may be pertinent 
and fuitable for their purpofe 5 of which the faid Sea- men 
ffeould be defired to keep an exa® Diary , delivering at their 
return a Fair Copy thereof to the Lord High Admiral of En- 
gland s his Royal Highnefs the Duke of Tork^ , and another to 
Trinity - houfe to be perufed by the R. Society. Which Cata- 
logue o $ Dtre&iom having been drawn up accordingly by the 
faid Mr. Rook^ and by him prefented to thofe , who appoin- 
ted him to expedite fuch an one , it was thought not to be 
unfeafonable at this time to make it publique, the more con- 
veniently to furnifh Navigators with Copies thereof. They 
are fuch, as follow 5 
f ; T 0 obferve the Declination of the Compaj} 3 or its Va- 
riation from the M vidian of the place,frequently % marking 
wit f ul . the Latitude and Longitude of the place , wherever 
fuch Obfervation h made, as exaftly as may be, and fetting 
down the 'Method 3 by which they made them. 
2. To carry Dipping Ne dies with them, and obferve 
the Inclination of the Needle in like manner. 
To remark carefully thr Ebbings and Flowings of the 
Sea, in as many places as they can, together with all the Ac- 
V 2 cidents* 
