But to return to the ‘Diary’ of Sir Humphrey Davy. This pamphlet was not designed for the public eye, even upon the decease of the writer, as any person at all conversant with authorship may satisfy himself at once by the slightest inspection of the style. At page 13, for example, near the middle, we read, in reference to his researches about the protoxide of azote: ‘In less than half a minute the respiration being continued, diminished gradually and were succeeded by analogous to gentle pressure on all the muscles.’ That the respiration was not ‘diminished,’ is not only clear by the subsequent context, but by the use of the plural, ‘were.’ The sentence, no doubt, was thus intended: ‘In less than half a minute, the respiration [being continued, these feelings] diminished gradually, and were succeeded by [a sensation] analogous to gentle pressure on all the muscles.’ A hundred similar instances go to show that the MS. so inconsiderately published, was merely a rough note-book, meant only for the writer’s own eye, but an inspection of the pamphlet will convince almost any thinking person of the truth of my suggestion. The fact is, Sir Humphrey Davy was about the last man in the world to commit himself on scientific topics. Not only had he a more than ordinary dislike to quackery, but he was morbidly afraid of appearing empirical; so that, however fully he might have been convinced that he was on the right track in the matter now in question, he would never have spoken out, until he had every thing ready for the most practical demonstration. I verily believe that his last moments would have been rendered wretched, could he have suspected that his wishes in regard to burning this ‘Diary’ (full of crude speculations) would have been unattended to; as, it seems, they were. I say ‘his wishes,’ for that he meant to include this note-book among the miscellaneous papers directed ‘to be burnt,’ I think there can be no manner of doubt. Whether it escaped the flames by good fortune or by bad, yet remains to be seen. That the passages quoted above, with the other similar ones referred to, gave Von Kempelen the hint, I do not in the slightest degree question; but I repeat, it yet remains to be seen whether this momentous discovery itself (momentous under any circumstances) will be of service or disservice to mankind at large. That Von Kempelen and his immediate friends will reap a rich harvest, it would be folly to doubt for a moment. They will scarcely be so weak as not to ‘realize,’ in time, by large purchases of houses and land, with other property of intrinsic value.