REMARKS ON C. S. PEIRCE'S PAPER ON THE GHOSTS IN RUTHERFORD'S ON A CONTINUATION OF ARGELANDER'S DURCHMusterung. By ON THE CONSTRUCTION OF A MICROMETER FOR DOUBLE STAR OBSERVATIONS. By Ormond Stone, of Mount Lookout, Ohio. ON THE DRAWING OF NEBULAE. By Ormond Stone, of Mount Lookout, Ohio. ON UNIFORM TIME. By Ormond Stone, of Mount Lookout, Ohio. HEAT PRODUCED BY MAGNETIZING AND DEMAGNETIZING IRON AND STEEL. By John Trowbridge, of Cambridge, Mass. METHODS IN USE AT THE OBSERVATORY OF YALE College for THE VERIFICATION OF THERMOMETERS, AND THE TESTING OF TIME PIECES. By Leonard Waldo, of New Haven, Ct. THEORY OF the tides. By James D. Warner, of Brooklyn, N. Y. "ACTIO IN DISTANS AND ITS EFFECTS. By J. D. Warner, of Brooklyn, N. Y. ON THE REFRACTIVE INDEX OF METALLIC SILVER. By A. W. Wright, of New Haven, Ct. ON A FORM OF VACUUM TUBE FOR SPECTROSCOPIC WORK. By A. W. Wright, of New Haven, Ct. SPECTROSCOPIC NOTES: BEING A NOTICE OF CERTAIN SPECTROSCOPIC OBSERVATIONS, PRINCIPALLY SOLAR, MADE IN 1879 AND 1880. By C. A. Young, of Princeton, N. J. THE THERMO-ELECTRIC ELECTRO-MOTIVE POWER OF IRON AND PLATINUM IN VACUO. By C. A. Young, of Princeton, N. J. Many of the above papers have been printed since the meeting in the AMERICAN JOURNAL OF SCIENCE, the AMERICAN JOURNAL OF OTOLOGY, and in SCIENCE. ADDRESS OF PROFESSOR JOHN M. ORDWAY, CHAIRMAN OF THE SUBSECTION OF CHEMISTRY. GENTLEMEN OF THE SUBSECTION OF CHEMISTRY: Ir is well for us to pause sometimes in the midst of our busy and wearisome labors and consider the progress of the past, the wants of the present, and the promise of the future. It is best for us to have both humiliation and encouragement mingled in just proportion, and a clear-eyed outlook is always sure to show room for both. Chemistry as an art and Chemistry as a science jointly occupy fields so extensive and so diversified that we can hope to make but a very partial survey in the time allotted to a discourse, and I trust that no one will feel aggrieved, if, in this imperfect sketch, the fruits of his own "little field.well tilled" shall receive a mere glance or even escape notice altogether. The past year has been one of laborious and fruitful activity in various departments of chemistry, but we cannot yet see that the year is marked by any of those epoch-making discoveries that have sometimes startled the world, and sometimes have come almost as silently as the dew of night to refresh the fields of science. Thus in 1807, when Davy, with his magnificent voltaic battery, isolated potassium and closed the record in his note book with the triumphant exclamation "Capital experiment,-proving the de |