PREFACE. THE following lectures, drawn up under the pressure of more imperative and quite otherwise directed work, contain many passages which stand in need of support, and some, I do not doubt, more or less of correction, which I always prefer to receive openly from the better knowledge of friends, after setting down my own impressions of the matter in clearness as far as they reach, than to guard myself against by submitting my manuscript, before publication, to annotators whose stricture or suggestion I might often feel pain in refusing, yet hesitation in admitting. But though thus hastily, and to some extent incautiously, thrown into form, the statements in the text are founded on patient and, in all essential particulars, accurately recorded observations of the sky, during fifty years of a life of solitude and leisure; and in all they contain of what may seem to the reader questionable, or astonishing, are guardedly and absolutely true. In many of the reports given by the daily press, my assertion of radical change, during recent years, in weather aspect was scouted as imaginary, or insane. I am indeed, every day of my yet spared life, more and more grateful that my mind is capable of imaginative vision, and liable to the noble dangers of delusion which separate the speculative intellect of humanity from the dreamless instinct of brutes: but I have been able, during all active work, to use or refuse my power of contemplative imagination, with as easy command of it as a physicist's of his telescope: the times of morbid are just as easily distinguished by me from those of healthy vision, as by men of ordinary faculty, dream from waking; nor is there a single fact stated in the following pages which I have not verified with a chemist's analysis, and a geometer's precision. The first lecture is printed, with only addition here and there of an elucidatory word or phrase, precisely as it was given on the 4th February. In repeating it on the 11th, I amplified several passages, and substituted for the concluding one, which had been printed with accuracy in most of the leading journals, some observations which I thought calculated to be of more general interest. To these, with the additions in the first text, I have now prefixed a few explanatory notes, to which numeral references are given in the pages they explain, and have arranged the fragments in connection clear enough to allow of their being read with ease as a second Lecture. HERNE HILL, 12th March, 1884. in the forty following years (1831 to 1871 approximately-for the phenomena in question came on gradually)-no such clouds as these are, and are now often for months without intermission, were ever seen in the skies of England, France, or Italy. In those old days, when weather was fine, it was luxuriously fine; when it was bad-it was often abominably bad, but it had its fit of temper and was done with it-it didn't sulk for three months without letting you see the sun,-nor send you one cyclone inside out, every Saturday afternoon, and another outside in, every Monday morning. In fine weather the sky was either blue or clear in its light; the clouds, either white or golden, adding to, not abating, the lustre of the sky. In wet weather, there were two different species of clouds,-those of beneficent rain, which for distinction's sake I will call the non-electric rain-cloud, and those of storm, usually charged highly with electricity. The beneficent rain-cloud was indeed often extremely dull and grey for days together, but gracious nevertheless, felt to be doing good, and often to be delightful after drought; capable also of the most exquisite colouring, under certain conditions;* and continually traversed in clearing by the rainbow:—and, secondly, the storm-cloud, always majestic, often dazzlingly beautiful, and felt also to be beneficent in its own way, affecting the mass of the air with vital agitation, and purging it from the impurity of all morbific elements. In the entire system of the Firmament, thus seen and understood, there appeared to be, to all the thinkers of those ages, the incontrovertible and unmistakable evidence of a Divine Power in creation, which had fitted, as the air for human breath, so the clouds for human sight and nourishment; the Father who was in heaven feeding day by day the souls of His children with marvels, and satisfying them with bread, and so filling their hearts with food and gladness. --- Their hearts, you will observe, it is said, not merely their bellies, or indeed not at all, in this sense, their bellies--but the heart itself, with its blood for this life, and its faith for the next. The opposition between this idea and the notions of our own time may be more accurately expressed by modifica tion of the Greek than of the English sentence. The old Greek is ἐμπιπλῶν τροφῆς καὶ ἐυφροσύνης filling with meat, and cheerfulness, our hearts. The modern Greek should be ἐμπιπλῶν ἀνέμου καὶ ἀφροσύνης filling with wind, and foolishness, our stomachs. You will not think I waste your time in giving you two cardinal examples of the sort of evidence which the higher forms of literature furnish respecting the cloud-phenomena of former times. When, in the close of my lecture on landscape last year at Oxford, I spoke of stationary clouds as distinguished from passing ones, some blockheads wrote to the papers to say that clouds never were stationary. Those foolish letters were so far useful in causing a friend to write me the pretty one I am about to read to you, quoting a passage about clouds in Homer which I had myself never noticed, though perhaps the most beautiful of its kind in the Iliad. In the fifth book, after the truce is broken, and the aggressor Trojans are rushing to the onset in a tumult of clamour and charge, Homer says that the Greeks, abiding them, "stood like clouds." My correspondent, giving the passage, writes as follows: "SIR,-Last winter when I was at Ajaccio, I was one day reading Homer by the open window, and came upon the lines ̓Αλλ' ἔμενον, νεφέλῃσιν εοικότες ἅς τε Κρονίων Πνοιῇσιν λυγυρῇσι διασκιδνᾶσιν ἀέντες· Ως Δαναοί Τρώας μένον ἔμπεδον, οὐδ ̓ ἐφέβοντο. 'But they stood, like the clouds which the Son of Kronos stablishes in calm upon the mountains, motionless, when the |