_Their_ work is done. Their monuments stand in all lands, and yet _one_ of this band of truly great and worthy names still lives, and to him I am indebted for many kind and encouraging words. It is little besides this that I ask of _you_. The stock which you are solicited to take in this enterprise is small. But enable me by your patronage to devote myself for a time wholly to my project. See to it, that I do not fail for want of support. Buy my little pamphlet at its insignificant cost, ask your friends to do so; and should any of you wish to contribute anything more to this cause, which I have made my own, and which I am determined to push to a triumphant issue, he may be sure that he will receive the acknowledgments of a grateful and earnest man, who has himself devoted to it the aspirations and efforts of a long life, and who is still willing to take all the risks of failure upon himself. The undersigned would be pleased to have friends interested in this subject, call upon him, when the matter will be more fully described. ROBERT HARDLEY, 17 PERRY STREET, or 114 Sixth Ave., cor. 9th St. [Illustration: THE AERIAL MACHINE.] REMARKS ON THE ELLIPSOIDAL BALLOON, PROPELLED BY THE _Archimedean Screw_, DESCRIBED AS THE NEW AERIAL MACHINE, NOW EXHIBITING AT THE ROYAL ADELAIDE GALLERY, LOWTHER ARCADE, STRAND. REMARKS, &c. The object proposed in the construction of the Machine which is here presented to the public view, is simply to illustrate and establish the fact, that, by a proper disposition of parts and the application of a sufficient power, it is possible to effectuate the propulsion or guidance of a Balloon through the air, and thus to prepare the way for the more perfect accomplishment of this most interesting and desirable result.