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diſcoverable at firſt only with the microſcope, but afterwards growing with the ſtone. From this fact, I ſuppoſe, he would have us infer, that beſides the uſual proceſs for generating ſhells by the elaboration of earth and water in animal veſſels, nature may have provided an equivalent operation, by paſſing the ſame materials through the pores of calcareous earths and ſtones: as we ſee calcareous drop-ſtones generating every day by the percolation of water through lime-ſtone, and new marble forming in the quarries from which the old has been taken out; and it might be aſked, whether it is more difficult for nature to ſhoot the calcareous juice into the form of a ſhells than other juices into the forms of cryſtals, plants, animals, according to the conſtruction of the veſſels through which they paſs? There is a wonder ſomewhere. It is greateſt on this branch of dilemma; on that which ſuppoſes the existence of a power, of which we have no evidence in any other caſe; or on the firſt, which requires us to believe the creation of a body of water and its ſubſequent annihilation? The eſtabliſhment of the inſtance, cited by M. de Voltaire, of the growth of ſhells unattached to animal bodies, would have been that of his theory. But he has not eſtabliſhed it. He has not even left it on ground ſo reſpectable as to have rendered it an object of enquiery to the literati of his own country. Abandoning this fact, therefore, the three hypotheſes are equally unſatisfactory; and we muſt be contented to acknowledge, that this great phenomanon is as yet unſolved. Ignorance is preferable to error; and he is leſs remote from the truth who believes nothing, than he who believes what is wrong.