self nearly to the contents of the following passes.
Several of his friends who had attended the Lectures, were pleased to think that the subject had profited much in his hands; and that the science, thus illustrated and explained, was much more intelligible than it was in its original state of communication. They accordingly urged him to publish this improved account of the system, as well for the benefit of those persons who had actually attended courses of Lectures, as of those who would be satisfied with such an account of it as is herein contained. With this request he has complied, whether rightly or erroneously, it is not, perhaps, for him to determine. On (his subject he only wishes to add, that, however secondary and derivative this undertaking may, at first sight, appear to those who have not attended the Lectures,—they who have attended them, will be able, (the Editor is confident,) to give him ample credit for originality.
No expense has been spared in supplying tin's volume with appropriate engravings, together with the diagrams necessary to illustrate the work, and which have been chiefly furnished to him by the kindness of his friends.
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