In 1759 James Watt made his first model of a steam carriage. In 1784 he took out a patent. In 1803 the first engine was built, but it was not until 1824 that the experiment of running a locomotive from Liverpool to Stockport was made. Until Mr. Keely's commercial engine is perfected and patented, now that scientists are beginning to support him as the discoverer of an unknown force, ridicule should give way to sympathy; for we know that nature never reveals one of her tyrant forces without at the same time showing how this force is to be transformed into the slave of man, and that complete success is only a question of time.--Anglo-Austria, March, 1890. SOME RECENT EXPERIMENTS. [8] Copy of a Letter addressed to Professor Dewar of the Royal Institution of Great Britain. Dear Professor Dewar,--As I have already informed you, I carried out your wishes in reference to Professor Rowland of the John Hopkins University, as far as extending to him an invitation to witness some of Mr. Keely's experiments in sympathetic vibration was concerned. Professor Rowland was not able to witness any demonstration whatever, on account of an accident which happened to the disintegrator, and he could not fail to have formed an unfavourable opinion of Mr. Keely from all that transpired on that occasion. I next renewed the invitation to Professor Barker, which had already been extended to him by Professor Leidy, both of these gentlemen being Professors in the Pennsylvania University. Professor Barker was not able to be present. The series of experiments which have been given for scientists, mechanical engineers, and others since my return, closed on the 12th. The steady progress from week to week, since the accident to the disintegrator was repaired, has given beautiful evidence of the wisdom of the plan adopted by Mr. Keely in the winter of 1888-89, which led him to turn his attention to a class of experiments of quite a different nature from those which, up to that time, had been made for commercial ends; experiments which have not failed to convince all who attended the entire series that Mr. Keely is dealing with an unknown force, the laws governing which he is still in partial ignorance concerning. He admits now that he cannot construct a patentable engine to use this force till he has mastered the principle; and a fund, with the approval of scientists, has been appropriated for this end, upon the condition that he will waste no more time upon what is known as the Keely Motor Engine until he has demonstrated his ability to control reversions and in all points to govern the revolutions.