The Emporium of arts & sciences . eacon ; for it is not pos-sible to agree upon a signal for such events as it is im-possible to foresee. iEneas,* who wrote a treatise on the duties of a gene-ral, endeavoured to complete what was wanting on thisoccasion; but he was far from succeeding so well ascould have been wished, or as he himself had proposed,of which the reader may now judge. Those, says he, who would give signals to one ano-ther, upon affairs of importance, must first prepare twovessels of earth, exactly equal in breadth and depth ; andthey need be but four feet and an half deep, and a
The Emporium of arts & sciences . eacon ; for it is not pos-sible to agree upon a signal for such events as it is im-possible to foresee. iEneas,* who wrote a treatise on the duties of a gene-ral, endeavoured to complete what was wanting on thisoccasion; but he was far from succeeding so well ascould have been wished, or as he himself had proposed,of which the reader may now judge. Those, says he, who would give signals to one ano-ther, upon affairs of importance, must first prepare twovessels of earth, exactly equal in breadth and depth ; andthey need be but four feet and an half deep, and a foot * iEneas was cotemporary with Aristotle. He wrote a treatise on the art ofwar. Cineas, one of Pyrrhuss counsellors, made an abridgment of it. Pyrrhusalso wrote on the same subject. iEiian. Tact. cap. 1. Cicero mentions the twolast in one of his epistles. Summum me ducem liters tuae reddiderunt. Planenesciebam te tarn peritum esse rei militaris. Pyrrhi te libros et Cinese videolectitasse. Lib. ix. Epist. 25. ad Papir. Entvorium of Arte SC Scittice*. On Signals made by Fire, S97 and an half wide. They then must take pieces of cork,proportioned to the mouth of these vessels, but not quiteso wide, that they may be let down with ease to the bot-tom of these vessels. They next fix in the middle of thiscork a stick, which must be of equal size in both thesevessels. This stick must be divided exactly and distinct-ly by spaces of three inches each, in order that suchevents as generally happen in war may be written onthem. For example, in one of these intervals the follow-ing words may be written : A body of horse are march-ed into the country. On another, A body of infantry,heavily armed, are arrived hither. On a third, Infan-try lightly armed. On a fourth, Horse and foot. Onanother, Ships. Then, Provisions : and so on, tillall the events which may probably happen in the \var thatis carrying on are written down in these intervals. This being done, each of the t
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