Dr. Terby of Louvain, in a memoir entitled "Physical Observations of Mars," a translation of which appeared in the "Astronomical and Astrophysical Journal," No. 106, identifies many of Schiaparelli's _canali_ and other details depicted in Schiaparelli's map of Mars. In conclusion Dr. Terby says: "After what we have seen we dare affirm that henceforth the progress of areography will be in the hands of those alone who, freeing themselves from the shackles of doubt, will resolutely engage in the way traced by the celebrated astronomer of Milan. A new era has begun in the study of Mars by the discovery of canals and their doubling, and by the micrometric determination of one hundred and fourteen fundamental points on the map, an era succeeding to that which was inaugurated a half century ago by the construction of the first two hemispheres and by the approximate fixing of fourteen points by Mäedler." Dr. Terby further says: "But these results have an incontestable value in the presence of the incredulity with which certain astronomers still consider the beautiful discoveries of Milan. Who would believe it? In spite of the beautiful drawings of M. Perrotin one reads still that the discoveries of M. Schiaparelli have not been confirmed by the largest instruments." In "Astronomy and Astrophysics," No. 108, is published a series of contributions on Mars by Professors Edward C. Holden, William H. Pickering, C. A. Young, Lewis Swift, George C. Comstock, E. E. Barnard, and H. C. Wilson. All of these men are astronomers and all are connected as directors or observers with various observatories in the United States. Many sent sketches, most of them saw the canals, all saw the polar snow caps and darker regions. To say that these astronomers were sketching details which existed only in their imagination is simply preposterous. Professor Herbert A. Howe, Director of the Chamberlin Observatory, at Denver, in his "Elements of Descriptive Astronomy" says: "If we have simply to answer the question, 'Would a man, as constituted at present, if transported to Mars find it possible to exist there?' The most probable answer is, 'No.' While one must not be dogmatic, it may be said, with some assurance, that the man would gasp a few times and die. However, it is conceivable that manlike beings might find a home there." Mr. Howe could have said without being dogmatic that a man thus transported would die of what is known as Caisson disease.