Looking at my request from another point of view, do you not think it due to extend to Mr. Keely an opportunity to prove all that one of your number is ready to announce as his conviction in regard to the claims of Mr. Keely? You all know to whom I refer--Professor Joseph Leidy. "Oh, Leidy is a biologist," said an English physicist not long since; "get the opinion of a physicist for us." If I did not wish for the opinion of physicists, I should not have appealed to you for help at this most critical juncture. But I also ask that no opinion be given by any physicist until Mr. Keely's theories are understood and demonstrated, by experiment. Yes, Dr. Leidy is a biologist, and what better preparation could a man have than a study of the science of life to enable him to discern between laws of nature as invented by physicists, and nature's operations as demonstrated by Keely? The science of life has not been the only branch to which Dr. Leidy has given profound attention; it is his extensive and accurate knowledge of its methods, limits, and tendencies, which prepared the way for that quick comprehension of possibilities, lying hidden from the sight of those men of science whose minds have rested (rusted?) in the dead grooves of mechanical physics. In Dr. Leidy we find entire scientific and intellectual liberty of thought, with that love of justice and truth which keeps its possessor from arrogance and intolerance, leading him with humility to "prove all things and hold fast to truth." To such men the world owes all that we have of advance since the days when science taught that the earth is flat, arguing that were it round the seas and oceans would fall off into space. In Dr. Leidy's name and in justice to him, I ask your sanction to and approval of my efforts to preserve Keely's discoveries for science;--discoveries which explain, not only the causes of the planetary motions but the source of the one eternal and universal force. An Appeal in Behalf of Science. A paper read by Mrs. Bloomfield Moore at the house of Provost Pepper on the evening of January 14th, 1891, before members of the board of trustees and professors of the University of Pennsylvania. Each day he wrought, and better than he planned, Shape breeding shape beneath his restless hand; The soul without still helps the soul within, And its deft magic ends what we begin. George Eliot. I hope that I do not seem to be too presumptuous in my effort to awaken an interest, on your part, in the discoveries of Keely which have aroused a marked degree of attention among some of the most learned men in Europe.