The discussion of M. Perrey's local catalogues with those of others, in reference to a supposed prevalent apparent horizontal direction of shock in certain regions--as to distribution, as to season, months, time of day or night, relation to state of tide--the bearings of the views of Zantedeschi and others as to the probable existence of a terrane tide--the supposed relations of the occurrence of Earthquakes upon the age of the moon, as deduced by Perrey, viz.: that 1st, Earthquakes occur most frequently at the syzygies; 2nd, that their frequency increases at the perigee and diminishes at the apogee; 3rd, that they are more frequent when the moon is on the meridian than when she is 90° away from it--and the views of several authorities as to the distribution of Earthquakes in time and in space--occupy the first 46 pages of this Report. It then proceeds to discuss the distribution in time and in space as deduced from the full base of the great catalogue. The results as to time are reduced to curves, and those as to space (or distribution over our globe's surface) to the great seismic map (Mercator's projection), upon which and in accordance with certain principles and conventional laws, which admit of the indication of both intensity and frequency, all recorded Earthquakes have been so laid down as to present a real indication of the distribution of seismic energy for the whole historic period and all over the world. The original of this map, which also shows the Volcano (size, about 7 feet by 5 feet), remains for reference in the custody of the Royal Society. A reduced copy was published with the Report, and to a still more reduced scale has been reproduced in other places. It is impossible here to do more than refer to a few of the more salient points. As regards distribution in time, durational seismic energy may be considered as probably constant during historic time, though it is probably a decaying energy viewed in reference to much longer periods. It does not appear of the nature of a distinctly periodic force. 1. Whilst the minimum paroxysmal interval may be a year or two, the average interval is from five to ten years of comparative repose. 2. The shorter intervals are in connection with periods of fewer Earthquakes, not always with those of least intensity, but usually so. 3. The alternations of paroxysm and of repose appear to follow no absolute law deducible from these causes. 4. Two marked periods of extreme paroxysm are observable in each century (for the last three centuries), one greater than the other--that of greatest number and intensity occurring about the middle of each century, and the other towards the end of each.