From the English translation:
"The proceding considerations tend to establish that dental caries results from a purely chemical alteration of the enamel and ivory of the teeth either by the products of acid fermentation developed in the saliva or by active agents introduced directly into the mouth. Now, if this theory be correct, we should be able to obtain the same effects by subjecting sound human teeth out of the body and deprived of life to the direct action of the same agents which produce this affection in the economy. This is in fact possible, and we shal lrelate and develop a series of experments by which, sometimes in the mouth and under the ordinary conditions of develpment of natural caries, sometimes in liquids artifically prepared, we have produced changes identical with that of this malady.
"Thus will be demonstrated, as it seems, without doubt, the true nature of dental caries, which it will be impossible to regard henceforward as an affection of internal and organic origin or a vital lesion of nutrition, as has been generally believed up to this time"
Digital facsimile from Wellcomecollection.org at this link. Translated into English by Thomas H. Chandler as Treatise on dental caries. Experimental and therapeutic investigations. Boston: Houghton, Osgood and Company, 1878. Digitial facsimile of the English translation from Google Books at this link.