"So from the heart the sanguine stream distils, O'er Beauty's radiant shrine in vermil rills, Feeds each fine nerve, each slender hair pervades, 50 The skins bright snow with living purple shades, Each dimpling cheek with warmer blushes dyes, Laughs on the lips, and lightens in the eyes. --Erewhile absorb'd, the vagrant globules swim From each fair feature, and proportion'd limb, 55 Join'd in one trunk with deeper tint return To the warm concave of the vital urn. II. 1."AQUATIC MAIDS! YOU sway the mighty realms Of scale and shell, which Ocean overwhelms; As Night's pale Queen her rising orb reveals, 60 And climbs the zenith with refulgent wheels, Car'd on the foam your glimmering legion rides, Your little tridents heave the dashing tides, Urge on the sounding shores their crystal course, Restrain their fury, or direct their force. [_Car'd on the foam_. l. 61. The phenomena of the tides have been well investigated and satisfactorily explained by Sir Isaac Newton and Dr. Halley from the reciprocal gravitations of the earth, moon, and sun. As the earth and moon move round a centre of motion near the earth's surface, at the same time that they are proceeding in their annual orbit round the sun, it follows that the water on the side of the earth nearest this centre of motion between the earth and moon will be more attracted by the moon, and the waters on the opposite side of the earth will be less attracted by the moon, than the central parts of the earth. Add to this that the centrifugal force of the water on the side of the earth furthest from the centre of the motion, round which the earth and moon move, (which, as was said before, is near the surface of the earth) is greater than that on the opposite side of the earth. From both these causes it is easy to comprehend that the water will rise on two sides of the earth, viz. on that nearest to the moon, and its opposite side, and that it will be flattened in consequence at the quadratures, and thus produce two tides in every lunar day, which consists of about twenty- four hours and forty-eight minutes. These tides will be also affected by the solar attraction when it coincides with the lunar one, or opposes it, as at new and full moon, and will also be much influenced by the opposing shores in every part of the earth.