And that we may Answer all _Objections_, which may arise, on Account of the said Vicissitude of the Air, Motion of the Ship, Foulness of the Movement, _&c._ as well as render this Discovery more intelligible, we will descend to speak thereof more particularly: And, In the first place, let Five or Six (or what Number you please) of these Movements be made; and after they have gone for a Month or two, (or if designed for the Sea, ’till within two or three Weeks of your Sailing) then take them asunder, and set them going by the _Meridian_ Line, as before directed. And having entred down in the Book, herein after mentioned, the Day of the Month, when set going; how long it is making one Revolution; and what Number is produced, in just Ten Days Motion, (all which must be done, before you Sail in every Voyage;) Let them be carry’d to Sea, into any Latitude, (suppose 50 Deg. or _Newfoundland_) and at their Return bring them again to the said _Meridian_ Line, and thereby (with the help of the Number of Days from their being first set in Motion) find the two first ~Proportional Numbers~, as before directed: Which done, enter them in a Book, peculiar to each Movement, (the Form whereof followeth) together with the Latitude, and Season of the Year in which the Voyage was made. Then will they all be fitted for a Voyage to _Newfoundland_, and Parts adjacent, for any such Season. And so for any other, when Tried and Entred, as now directed. After which, send them all in a Ship bound to the Latitude of about 37 Deg. (suppose _Virginia_); and being returned, let the Numbers be found and entred, as aforesaid, with the Latitude and Season; then will any one, or all of them, be fitted for a Voyage, either to _Newfoundland_ or _Virginia_, or any of those Parts, for any such like Season; and so for any other, when Tried and Entred as aforesaid. This being done, send them also in a Ship, bound to the Latitude of 13 Deg. (suppose _Barbados_ or _Jamaica_;) and being returned, find the Numbers, and enter them with the Latitude and Season: So will they all be fitted for these several Latitudes, (_viz._) 50 Deg. 37 Deg. and 13 Deg. at such a Season: And by a like Process to the _Æquinoctial_, and towards the _North Pole_. Upon which several Tryals, you will have so many Movements fitted for all the _North Hemisphere_, both for Hot, Cold and Temperate Seasons. And, by only Counterchanging the Latitudes, for the whole Globe; or at least for the Marine Parts thereof.