Von Kempelen and His Discovery (+Biography and Bibliography) (6X9po Matte Cover Finish): After the very minute and elaborate paper by Arago, to say nothing of the summary in 'Silliman's Journal, ' with the detailed statement just published by Lieutenant Maury, it will not be supposed, of course, that in offering a few hurried remarks in reference to Von Kempelen's discovery, I have any design to look at the subject in a scientific point of view. My object is simply, in the first place, to say a few words of Von Kempelen himself (with whom, some years ago, I had the honor of a slight personal acquaintance), since every thing which concerns him must necessarily, at this moment, be of interest; and, in the second place, to look in a general way, and speculatively, at the results of the discover