A new discovery for finding the longitude

A New Discovery For Finding the LONGITUDE.
Humbly Submitted to the
Approbation of the Right Honourable the Lords Spiritual and Temporal, and the Rest of the Honourable Persons, appointed by the late Act of Parliament , for Hearing and Determining Proposals relating to the said Longitude.
By William Hobbs, Philo Mathem.
LONDON:
Printed for the Author, and are to be Sold by Fard. Burleigh in Amen-Corner .
Price Six-pence.
Note , The former Impression was Printed July 12. 1714.

For Finding the Longitude, it is to be noted, That if the true Hour, and Minute of the Day, at the Place of our first Departure, and where we are Arrived, can be both obtained, the Difference of Longitude may be found, as truly as the Difference of Latitude.
For which purpose the Spring-Movement hereunto subjoined, is most humbly proposed to effect the same, even to the Tenth of a Minute of Time. So that should the Error of a Minute happen to be found in Practice, it must proceed from the Influence or Vicissitude of the Air, and not from any Defect in the Rules by which the said Movement is composed, as will plainly appear by the Explication thereof, in the following Lines; and first of
This Movement may be either of the Form and Bigness of that in a Common Clock; or else of the Smallness of a Pocket Watch, as may be thought convenient in Practice. But the larger it is, the better the Divisions in the Horologe will appear. And as for the Numbers, they may be at pleasure: Only this must be observ’d, That the swiftest Index must make just One Revolution, whilst the slow one goes but One of the Hundred Divisions, (as is common in Minute Watches, wherein 60 Minutes goes to an Hour) but the rest of the Numbers may be at pleasure, as aforesaid. And if the Slowest moves round in 3, 4, or 5 Days; and the Movement requires to be wound up once in 26 or 27 Hours, it will be sufficient: For the more Vigor the Motion is calculated for, the less the Air will affect it.