then avust b

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ed ander the line,

searly resealing

eviation from a circalar form in

derable, at the most only tex G which is scarce perceptible in a giv

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sink to the bottom. What makes it lighter, is the increase of its size; for, though it becomes at first more compact by cold, it dilates much when it becomes ice. This dilatation forms with so much violence, that ice can burst a copper globe of such a thickness, as would require a force for that purpose of 28,000 pounds. When the crust of ice forms itself at the top of the wa ter, the ice is still entirely transparent, but when it thickens, it becomes opaque. This darkness proceeds from the bubbles of air, more or less, which meet in the ice, and occasion a more fre quent refraction of rays. Ice continually exhales many vapours, even in the severest cold. It has been found, by repeated experiments, that, in the sharpest cold, four pounds of ice lose by evapo ration a whole pound of their weight in eighteen days; and that a piece of ice, weighing four ounces, becomes four grains lighter in the space of 24 hours. Ice generally begins at the top of the water. It is an error to imagine that it forms first at the bottom, and afterwards rises to the top: for the cold, which forms the ice, proceeding from the atmosphere, cannot take effect at the bot tom of the water, without having first frozen all the upper part of it. The manner in which ice is formed is equally remarkable. It is in this way when it freezes slowly, one sees a multitude of little strings come from the sides, within the glass, and take different directions, making all sorts of angles, and uniting again, they form at the top of the water a coat of very thin ice. To these first threads others succeed, which multipl and enlarge into the form of flakes; which, stil increasing in size and number, unite with the first coat. By degrees, as the ice thickens, a mul titude of bubbles appear, and the colder it grows, the larger the bubbles become: from whence it happens, that the transparency of the ice di minishes, particularly towards the middle; and

then it begins to dilate with violence, and swell into a greater size. When the cold is very sharp, and it freezes hard, there forms on the surface of the water a thin membrane, which, quitting the sides of the glass, extends towards the middle. Under this membrane there come others, which appear in triangular shapes, the basis of which is at the sides of the glass, while the sharpest angles go towards the middle. It is thus that the crust of ice thickens, becomes opaque by the bubbles of air it contains, and, by dilating, becomes more and more light.

But after having reflected on these phenomena, is it not natural to say to one's self, What order, what harmony, reign even in the least works of nature! With what weight and measure is all regulated according to the times and seasons! How does every thing in nature concur to fulfil the designs of God! How great will our admiration be, when we have a more perfect and distinct know ledge of all his wise purposes.

FEB. XII.

The Spherical Form of our Earth.

PEOPLE generally fancy the earth an even plain, a round, flat surface: but, if that was the case, the exterior limits of this surface would be found out; and, in approaching any place, it would be impossible to see the tops of towers and mountains before the lower parts of them. The earth then must be a globe; but it is not ex. actly and strictly spherical, for it is a little more raised under the line, and flatter towards the poles, nearly resembling an orange. But that deviation from a circular form is very inconsi derable, at the most only ten German miles, which is scarce perceptible in a globe whose cir

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cumference is 5400 German miles, and the dia meter 1720. There will be no doubt of the form of the earth being nearly spherical, if we consider that, in the eclipses of the moon, the shadow which the earth casts on that planet is always round. Besides, if the earth was not round, how could they have sailed round it, or how should the stars rise and set sooner in the eastern than in the western countries? Here, again, is the wisdom of the Creator manifest. The form he has given to the earth is the most proper and convenient for a world like ours, and for its inha bitants. Light and heat, so necessary for the preservation of creatures, are, by this means, equally and uniformly distributed over the whole earth. From thence also proceed the daily and annual returns of night and day, heat and cold, wet and dry, so constant and regular. The wa ter, in the first place, is equally distributed over the globe, and the salutary use of the winds is felt over every part of the earth. We should be deprived of all those advantages, if our earth had any other form. In some countries, it would be a paradise, in others a chaos; one part of it would be swallowed up in water, the other burnt up with the heat of the sun. In certain countries, they would be exposed to furious tempests, which would destroy every thing, while they would be stified in other places by the want of air, the current of which would be nearly stopped. One part of the earth would enjoy the benign influence of the sun, while the other would be frozen with cold. What pride and ignorance should we not betray, if we did not acknowledge in this the hand of an almighty and benevolent Creator? Should we deserve to inhabit a world, where all is so wisely ordained, if, like the brutes, we are insensible to this admirable plan, and to the numberless blessings which accrue from it? No, my God, and my Creator! let us never be guilty of such

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monstrous ingratitude. Let us adore thy wisdom: our weakness permits no more. He will vouchsafe to accept with goodness our humble attempts to glorify him, our knowledge, however limited, our thanksgiving, imperfect indeed, yet sincere.

FEB. XIII.

On the short Duration of Snow.

WE see the instability of snow, and how suddenly the heat of the sun, mild and damp air, or heavy rains, make it disappear. Every thing around us changes its appearance in a few hours; and there scarce remains the least trace of that snow which had covered the streets, villages, and fields.

Is not this sudden revolution calculated to make us reflect on the uncertainty and vanity of all earthly goods? Undoubtedly it is not without design that nature presents us with such images of the frailty of worldly things. In every season, in every variation that their return occasions, nature tells us, with a strong and persuasiye voice, this great truth, All is vanity. Let us look around us; do we see any thing that is not frail and perishable? How soon are we deprived of the pleasures of the senses! They disappear when we have scarce begun to enjoy them. We are often at sun-rise cheerful and content; and before it sets, we are plunged into sorrow and distress.

Has not every body experienced, in the course of their life, how uncertain and transient the enjoyments here are? The riches of which we are so proud, make themselves wings and fly away, Jike an eagle, from the possessor, when he flattered himself most with a peaceable and uninterrupted enjoyment of them. The step from the