chines; with new Calculations relating to their Nature, Power, and Operation. The whole collected and methodized from all the principal Authors, and public Memoirs, to the prefent Year. And embellished with Eighty-one Copper-Plates.

By B. MARTIN. T

To which is added a Supplement, containing two Appendixes: The firft, comprising the new Experiments on Electricity and Magnetifm: The fecond contains feveral new Improvements in Microfcopes, Telescopes, Micrometers, and other Op tical Inftruments. The Second Edition, in Three Volumes Octavo, Price 18 s. bound.

This Supplement may be had alone by thofe who bought the former Edition, Price 2. s. 6d.

6. PLUTARCH's LIVES, abridged from the Original Greek, and illuftrated with Notes and Reflections, for the Ufe of young Gen tlemen and Ladies.

The First Volume contains.

The LIVES of Plutarch, Thefeus, Romulus, Lycurgus, Numa, Solon, P. Valerius Poplicola, Themistocles, and Furius Camillus

The Second Volume contains, vo The LIVES of Pericles, Fabius Maximus, Alcibiades, C. M. Coriolanus, Timoleon, and Paulus Emilius,

The Third Volume contains.

The LIVES of Pelopidas, Marcellus, Arifti des, Cato the Cenfor, Philopoemen, F. Q: Flaminius, and Pyrrhus.

N. B. The Whole of the LIVE S recorded by Plutarch will be comprized in about Seven Volumes, and if they should exceed Eight, the Remainder will be given gratis. So that this

Work

Books published by J. NEWBERY. Work when complete will coft the Purchaser no more than twelve Shillings.

A Volume will be published the Firft of every Month, till the Whole is completed. Pr. 1 s. 6d. each, fewed, and embellished with Copper-plate Prints.

Biography has, ever fince the Days of Plutarch, been confidered as the most useful manner of Writing, not only from the Pleasure it affords the Imagination, but from the Inftruction it artfully and unexpectedly conveys to the Underftanding, It furnifhes us with an Opportunity of giving Advice freely, and without Offence.. It not only removes the Drynefs and dogmatical Air of Precept, but fets Perfons, Actions, and their Confequences before us in the most striking Manner; and by that Means turns even Precept into Example: Whence arifes the Propriety of placing thele Volumes in the Hands of Youth.

A Gentleman of uncommon Understanding, being asked what was the beft Leffon for Youth? answered, The Life of a good Man: And being asked, what was the next beft? replied, The Life of a bad one: For, that the firft would make him in love with Virtue, and teach him how to conduct himself through Life, fo as to become an Ornament to Society, and a Bleffing to his Family and Friends; and the laft would point out the hateful Confequences of Vice, and make him careful to avoid thofe Actions himself which appeared fo deteftable in others.

"What Histories can be found (fays the Mar"quis De Montesquieu) that pleafe and inftruct like "the Lives of Plutarch? He paints the Man "whole Life he relates; he makes him known fuch as he was at the Head of the Armies, in the "Governmen

"Government of the People, in his own Family, "and in his Pleasures. In fhort, I am of the fame "Opinion with that Author, who faid, that if he "was conftrained to fling all the Books of the "Antients into the Sea, PLUTARCH should be the laft drowned."

A

In the Course of this Work, all thofe Actions which are usually called Great and Glorious, but which are productive of the moft mifchievous Effects, will be particularly confidered, ftript of their captivating Glare, and reduced to the Standard of Reafon and of Juftice.

1

7. The WORLD DISPLAYED: Or, a curious Collection of Voyages and Travels, from the Writers of all Nations. In which the Conjectures and Interpolations of feveral vain Editors and Tranflators are expunged; every Relation is made concife and plain, and the Divifions of Countries and Kingdoms are clearly and distinctly noted. In 20 Volumes, Price 1.10 s. fewed, or 21. bound in Calf.

Curiofity is feldom fo powerfully excited, or fo amply gratified, as by faithful Relations of Voyages and Travels. The different Appearances of Nature, and the various Customs of Men, the gradual Difcovery of the World, and the Acci dents and Hardships of a naval Life, all concur to fill the Mind with Expection and with Wonder; and as Science, when it can be connected with Events, is always more easily learned, and more certainly remembered, the Hiftory of a Voyage may be confidered as the most useful Treatife on Geography, fince the Student follows the Travellers from Country to Country, and retains the Situation of Places by recounting his Adventures. It is hoped that this Collection wit be favourably received, as no one has hitherto been offered fo cheap, or fo commodious.