Part 2

_Note also_, That this Experiment may be sufficiently Tryed and Proved, by only two or three Voyages, to the South-West parts of _Ireland_, or to _Newfoundland_ at farthest.

But notwithstanding what has been said, It is chiefly to be noted, That altho’ I have proposed (for Example sake) that the General Numbers should be found, by Sailing to _Newfoundland_, _Virginia_, _Barbados_, &c. and returning again to a _Meridian Line_ at _London_: Yet if the _Honourable Persons_ before-mentioned in this Title-Page, to whom the whole is most humbly submitted, will please to appoint a Ship for this purpose, the said Numbers may be much better found in manner following; (that is to say) By ordering that the said Ship shall first make a true _Meridian Line_, at or near the Lat. of 60 Degrees; and thereby set the Movements going, in manner aforesaid: After which let them Sail about 40 or 50 Leagues distant from the Shore, and there Cruise _Northward_ and _Southward_ for about a Month’s time; after which let them return again to the same _Line_, and find the Numbers, and also enter them, as before directed. And having so done, let them make another _Meridian Line_, about 15 Deg. more Southward, and there do in like manner: And so at the like Distance to the _Equinoctial_. After which, let them begin again, and repeat the same Process for three or four times: By which means the Numbers will be found, and the different Motion of the Movement discover’d, for all Latitudes and Seasons, as near as needful.

And being returned home, by these Numbers we may find the true _Difference_ of Motion, in and for the several Latitudes and Seasons. Which _Difference_ must be entred in the 4th Column of the respective Books, reserved for that purpose. By the help of which said _Differences_, you may make as many Movements as may be needful, at any time; as also Books and Numbers peculiar to each Movement. The _Rules_ for which will be imparted to any such Watchmaker, as may Reasonably desire the same.

_FINIS._