Sidebilder
PDF
ePub

DF 2-1-43

[blocks in formation]

DUKE OF CLARENCE AND ST. ANDREW'S
IN GREAT BRITAIN.

[blocks in formation]
[ocr errors]

THIS SYSTEM OF PRACTICAL NAVIGATION, CONTAINING THE
ESSENTIALS OF THE MOST USEFUL IMPROVEMENTS
AND DISCOVERIES HITHERTO MADE,

[blocks in formation]

NAVY, the COMMANDERS and OFFICERS in the Service of the Honorable EAST-INDIA COMPANY, and MASTERS in the MERCHANTS Service,

GENTLEMEN,

YOU

OUR favorable Reception of my former Works has encouraged me to fubmit this Ninth Edition to your Perufal; in which I flatter myself you will find many Additions and Improvements; particularly in the Table of the Latitudes and Longitudes of Places, I have, fince the laft Edition was printed, collected upwards of four thousand Observations, made in various Parts, and compared them with those published by the Board of Longitude in London, the Royal Academy at Paris, and the most correct Charts now extant! This has enabled me to lay down the Situation of Places more correct than they were before.

The determining the Longitude by the Moon's Distance from the Sun and Stars, is now, I hope, rendered eafy, and all the Tables neceffary to be used with the Nautical Almanac are added; and fuch Care has been taken in correcting the other Tables, that they may be depended on. In fact, there has been fo much Pains taken in improving and correcting this, that you will find it not only a new Edition, but almoft a new Book,

That it may continue to meet with your Approba¬ tion, as an useful Companion at Sea, is the fincere Hope of,

GENTLEMEN १

Tower-Hill, London,

Your devoted

And very obedient Servant,

JOHN HAMILTON MOORE,

TO THЕ

TEACHERS OF NAVIGATION.

GENTLEMEN,

N the Course of your Tuition, it is probable that

I you have difcovered many Errors in the laft Edi

tion of this Book; for the Rapidity of its Sale induced others to print Copies of it, without that accurate Revifion neceffary in a Work of this Nature. Fraught with fo many Errors, I blushed. to behold what they unjustly called my PRACTICAL NAVIGATOR.

I am now, Gentlemen, happy in having the Opportunity of presenting you with a new Edition, revised and improved, which I truft is more confiftent with my Credit, and convenient for your Ufe; Concifenefs of Method, and Facility of Operation, being the principal Points aimed at.

I have inferted two Methods of reducing the apparent Distances of Celestial Objects to their true Diftances. These are exemplified and rendered easy. All the Tables requifite in the Calculations are properly numbered, for the more readily finding them; and the Examples are accommodated to the Year 1796, the Nautical Almanac for that Year being now published.

I have only, Gentlemen, respectfully to add, that by pointing out any Errors that may yet have escaped my Notice, you will confer a great Obligation on,

Your much obliged,

And very humble Servant,

JOHN HAMILTON MOORE,

Tower-Hill, London,

NAVY, the COMMANDERS and OFFICERS in the Service of the Honorable EAST-INDIA COMPANY, and MASTERS in the MERCHANTS Service,

GENTLEMEN,

YOUR

OUR favorable Reception of my former Works has encouraged me to fubmit this Ninth Edition to your Perufal, in which I flatter myself you will find many Additions and Improvements; particularly in the Table of the Latitudes and Longitudes of Places, I have, fince the laft Edition was printed, collected upwards of four thousand Obfervations, made in various Parts, and compared them with those published by the Board of Longitude in London, the Royal Academy at Paris, and the most correct Charts now extant! This has enabled me to lay down the Situation of Places more correct than they were before.

The determining the Longitude by the Moon's Distance from the Sun and Stars, is now, I hope, rendered eafy, and all the Tables neceffary to be used with the Nautical Almanac are added; and fuch Care has been taken in correcting the other Tables, that they may be depended on. In fact, there has been fo much Pains taken in improving and correcting this, that you will find it not only a new Edition, but almoft a new Book,

That it may continue to meet with your Approbation, as an useful Companion at Sea, is the fincere Hope of,

GENTLEMEN,

Tower-Hill, London,

Your devoted

And very obedient Servant,

JOHN HAMILTON MOORE,

« ForrigeFortsett »