Various - The Mirror of Literature, Amusement, and Instruction. Volume 13, No. 361, Supplementary Issue (1829)

A delightful volume, of title almost synonymous with this division of the MIRROR, has just been published. It is entitled The Journal of a Naturalist , 1 1 We are pleased therefore to commence our Supplementary Sheet with such a volume as the present, which we have reserved for this purpose. The feelings which it must engender in the reader will be doubly grateful in these troublous times of strong political excitement: they enjoin "peace on earth, and goodwill towards men." the Divine antidote to the storms of conflicting interests and passions, and the balm which heals the thorny wounds of the world, that cross every path and tear the finest sympathies of our nature. It adds, moreover, a pleasant variety to the contents of our sheet, and alternates with the vicissitudes of enterprise, in the progress of infant liberty in the New World, as in the Memoirs of the patriot Miller ;—the daring and recklessness of crime, as in the vivid sketch of First and Last ;—the picturesque country and ceremonies of Arabia and its religious people, as drawn by Burckhardt ;—and the architectural embellishment of the Metropolis, as shown in Britton's Picture of London . with the very appropriate motto of

The author in his preface, says, "Many years have now passed away since we were presented with that very interesting and amusing book, the 'Natural History of Selborne;' nor do I recollect any publication at all resembling it having since appeared." 2 2 In the MIRROR, dated March 1, 1828, we noticed "Gilbert White's Natural History of Selborne, is one of the most delightful household books in our language, and we are surprised at the rarity of such works." The publication of the Journal of a Naturalist , early in March, 1829, is "a coincidence." He then acknowledges the impression which this book left on his mind; and its having given rise to the present work, to which, in our humble opinion, it is a worthy companion.

Our "Naturalist" resides in a village upon a very ancient road, connecting Bristol and Gloucester, in a limestone district, numbering among its picturesque beauties, the broad estuary of the Severn, the mountains of Glamorgan, Monmouth, and Brecon, and their peaceful vales and cheerful cottages; Thornbury, with its fine cathedral-like church and castle, the red cliffs of the Severn, and numberless antiquities of our ancestors—as roads, encampments, aggera, watch-hills, coins, lances, and other relics of those warlike times. Labour and healthful enjoyment reign in this district: for it is neither torn up for its mineral wealth, nor are its natural beauties annihilated, or the habits of its population corrupted by speculation or avarice. A portrait of "a worthy peasant," introduced by our author, reminds us of

A passage quoted by the late Mr. Canning, in one of his finest speeches; and we often contrast this vigorous outline of the people of "merry England" with her artificial state of after times. Next are a page or two of agricultural chemistry ( analysis of soils ) unfettered with technicals; double the space of what may strictly be called rural economy, ( grass lands ) succeed; next the culture and history of the potato, and some new observations on " the Teazle ."

Several pages on trees possess great interest, as do those on flowers .

We regret we have room but for a few heads—the maple —the Naturalist's Autumnal Walk —the Economy of Animals , especially of Birds : we must pass them over to elucidate our engraving of

That pretty sparkler of our summer evenings, so often made the ploughboy's prize, the only brilliant that glitters in the rustic's hat, the glowworm, ( lampyris noctiluca ,) is not found in such numbers with us, as in many other places, where these signal tapers glimmer upon every grassy bank; yet, in some seasons, we have a reasonable sprinkling of them. Every body probably knows, that the male glowworm is a winged, erratic animal, yet may not have seen him. He has ever been a scarce creature to me, meeting perhaps with one or two in a year; and, when found, always a subject of admiration. Most creatures have their eyes so placed, as to be enabled to see about them; or, as Hook says of the house-fly, to be "circumspect animals;" but this male glowworm has a contrivance, by which any upward or side vision is prevented. Viewed when at rest, no portion of his eyes is visible, but the head is margined with a horny band, or plate, being a character of one of the genera of the order coleoptera , under which the eyes are situate. This prevents all upward vision; and blinds, or winkers, are so fixed at the sides of his eyes, as greatly to impede the view of all lateral objects. See Figures . The chief end of this creature in his nightly peregrinations is to seek his mate, always beneath him on the earth; and hence this apparatus appears designed to facilitate his search, confining his view entirely to what is before or below him. The first serves to direct his flight, the other presents the object of his pursuit: and as we commonly, and with advantage, place our hand over the brow, to obstruct the rays of light falling from above, which enables us to see clearer an object on the ground, so must the projecting hood of this creature converge the visual rays to a point beneath.

Glowworms emit light only for a short period in the year; and I have but partially observed it after the middle of July. I have collected many of these pretty creatures on a bank before my house, into which they retire during the winter, to shine out again when revived by the summer's warmth; but in this latter season I have frequently missed certain of my little protegés, and have reason to apprehend, that they formed the banquet of a toad, that frequented the same situation.

Observing above, that the glowworm does not emit light after the 14th of July, I mean thereby that clear, steady light, which has rendered this creature so remarkable to all persons; for I have repeatedly noticed, deep in the herbage, a faint evanescent light proceeding from these creatures, even as late as August and September. This was particularly manifested September the 28th, 1826. The evening was warm and dewy, and we observed on the house-bank multitudes of these small evanescent sparks in the grass. The light displayed was very different from that which they exhibit in warm summer months. Instead of the permanent green glow, that illumines all the blades of the surrounding herbage, it was a pale transient spot, visible for a moment or two, and then so speedily hidden, that we were obliged, in order to capture the creature, to employ the light of a candle. The number of them, and their actions, creeping away from our sight, contrary to that half lifeless dulness observed in summer, suggested the idea, that the whole body had availed themselves of this warm, moist evening, to migrate to their winter station. A single spark or so was to be seen some evenings after this, but no such large moving parties were discovered again. If we conclude, that the summer light of the glowworm is displayed as a signal taper, the appearance of this autumnal light can have no such object in view, nor can we rationally assign any use of it to the creature itself, unless, indeed, it serves as a point of union in these supposed migrations, like the leading call in the flight of night-moving birds. The activity and numbers of these insects, in the above-mentioned evening, enabled me to observe the frequent presence and disappearance of the light of an individual, which did not seem to be the result of will, but produced by situation. During the time the insect crawled along the ground, or upon the fine grass, the glow was hidden; but on its mounting any little blade, or sprig of moss, it turned round and presented the luminous caudal spot, which, on its falling or regaining its level, was hidden again.