part of the present groupe, although found at the same time and in the same spot. It should also be remembered that they were executed many centuries before Ovid's time, and doubtless, Scopas and Praxiteles would have preferred the authority of Homer, who gives Niobe only twelve children. In the excavation, with the exception of the two wrestlers, the statues of twelve children only were found, and these were in good preservation ;* fragments of the thirteenth and fourteenth would without doubt have been discovered had they existed; consequently it seems nearly certain, that the total number of the statues, including the mother and the statue No. 10, did not exceed fourteen. In Mr. Cockerell's design of the composition or restoration, only the fourteen figures, which were found together in the same excavation, have been introduced. Their disposition is regulated by their heights, which have been accurately measured, and by the form of the tympanum; and independently of this, it is frequently obvious by the relative connexion of the different statues. From this arrangement a beautiful composition is produced, in which is represented the fable of Niobe. The principles of elegance are completely observed in the groupe; six figures are symmetrically disposed on each side, presenting a variety of action and expression which produce an admirable contrast, and the composition may be considered as complete. M. Schlegel, in a paper which he wrote on the subject of Mr. Cockerell's design, expresses his entire assent to the general views of Mr. Cockerell respecting these statues, but questions the place assigned by him to some of them, his assertion that we are in possession of the whole number of statues which formed the original composition; and lastly, the originality of the whole; that is, whether these * M. Schlegel observes that this is somewhat inaccurate, as several of the statues required considerable restoration, and that some fragments had been collected together. statues are the production of Scopas, or Praxiteles, or merely a copy. In a remark on the difference in size between the mother and the children, M. Schlegel observes, that although it is contrary to the principles of art to employ two different scales for the dimensions of figures in the same composition, that the same objection arises with respect to the Laocoon and his children, and the Colossal figures on the Monte Cavallo and the horses: but that these incorrectnesses were not accidental, but designed for the production of beauty and a grand effect. In observing on the different statues, M. Schlegel suspects that No. 6 does not belong to the groupe, considering that statue not to partake of the light and youthful figure of the rest of the children. The statue No. 10, which Fabroni took for Amphion in the dress of a hunter, is also suspected by him. No. 11 is positively rejected as not belonging to the composition, the hair being arranged differently from the rest, and the head is without that general resemblance which appears to pervade the rest, and the figure does not seem to partake of the general action of the groupe. M. Schlegel closes his paper on the subject with the hope that Mr. Cockerell will speedily give to the public those designs and observations respecting ancient Greece which have so long occupied his attention. In this wish we very heartily concur ; and from what we have seen, can safely assert, that notwithstanding the ingenuity and knowledge which have been displayed by Mr. Cockerell, in the dissertation on these celebrated statues, his merits can in nowise be fairly estimated by the work we have noticed. ART. XIII. Select ORCHIDEE from the Cape of Good Hope. Continued from page 206 of the Fourth Volume of this Journal. OF F Disa porrecta, DISPERIS secunda, and DISPERIS capensis, represented in Plate I. of this Number. Three interesting Orchideous species are added in this place to the three of the last fasciculus. The drawings of these have been derived from the same source as those of the others, and we shall refer to the article concerning them for the character of the order, and for that of the genus DISA. Plate I. fig. 1. DISA PORRECTA. DISA porrecta, casque obtuse, conical at the back, spur subulate outstretched; interior segments with two teeth; label oblong undulated; spike ovate; many flowered. Disa porrecta. Swartz act. holm. 1800. 211. Id. in Schrader neues journal, 1. 27. Willd. sp. pl. 4. 47. There A species first recorded by Swartz. We are not aware that it has been even introduced into any European garden. are indigenous samples of it in the Banksian Herbarium, which were collected by Masson. DISPERIS. Corolla ringent, 5-parted: three of the segments exterior, upper one of these upright, vaulted, and forming with the two interior lateral ones, which are contiguous to it, either an upright or a depressed and incumbent casque. Two exterior lateral ones pointing forwards, and horizontally divergent, each with a short obtuse pouch or spur that projects downward: label upright from the base of the column, tapered at the lower part, grown to the parts of fructification, bent back at the top underneath the casque. Column very short, oblong-cylindrical. Anther grown to the column at the summit, either upright or reclined, oblong, two celled: concealed by a veil or curtain from each side of the edge of which a small cartilaginous spirally recurved strip is projected towards the front. Pollen-masses the same as in ORCHIS, with their footstalks adhering to the two strips of the veil. Stigma in front, near to the anther. Capsule like most others in the order. OBS. the name is compounded of die, dis, and xp, a pouch, the two exterior lateral segments of the corolla having each a small obtuse pouch or spur. The genus comes very near to PTERYGODIUM, but differs in having these pouches, as well as by the insertion of the label, besides having another shaped anther, and a differently situated stigma. DISA capensis, stem two-leaved, one flowered; leaves lanceolate. Disperis capensis. Swartz act. holm. 1800. 220. Id. in Schrader's neues journal. 1. 40. Willd. sp. pl. 4. 59. Arethusa capensis. Linn. suppl. 405. Thunb. prod. 3. Said to grow on the Table mountain. The genus is perhaps one of the most singular of the order. We know of no species of it that has been introduced into any European garden; or that has been represented by a published figure. Specimens of the present are preserved in the Banskian Herbarium. Plate I. fig. 3. DISPERIS SECUnda. DISPERIS secunda, stem two-leaved, many flowered, leaves linear flowers pointing one way. : Disperis secunda, Swartz act. holm. 1800. 220. Id. in Ophrys circumflexa. Lin. sp. pl. ed. 2. 2. 1344. Amæn. The Banksian Herbarium contains indigenous samples of the species, collected by Masson. ART. XIV. On Saline Crystallization. By ANDREW URE, M.D. Professor of the Glasgow Institution, and Member of the Geological Society. T It is well known that water and solutions of some salts will, under certain circumstances, preserve their fluidity, though cooled down many degrees below their ordinary congealing or crystallizing temperature. The most convenient, and perhaps striking mode of exhibiting this phenomenon, is to fill a phial with a hot saturated solution of sulphate of soda, to cork it well, and set it to cool in a quiet place. When the cork is afterward withdrawn, the liquid stratum at the surface instantly becomes a solid, with a pearly lustre ; then the parts beneath successively assume the same form, and thus the whole solution in a few seconds changes into a confused crystalline mass. At the instant of solidification the temperature arises from 30 to 40 degrees, affording a fine illustration of the doctrine of latent heat. Should the mere extraction of the cork fail to occasion this curious transition from the liquid to the solid state, it will be infallibly produced by touching the surface of the solution with a crystal of the salt. This phenomenon has been ascribed by some to the sudden abstraction of a portion of heat from the liquid, on the admission of the external air; whence the crystallization is determined at the surface, and proceeds gradually downwards; other hypotheses have also been offered; but I am not aware of any experiments having been made, with the view of elucidating the connexion of this phenomenon with the atmospheric air and other causes. The following, which were executed about two years ago, may perhaps serve to open some new trains of investigation. 1st. An 8 oz. phial filled with a saturated solution of sulphate of soda in boiling water was cooled down to 38° Fahr., (the temperature of the apartment,) without crystallizing, the mouth of it being well secured with ox-bladder, which the pressure of the atmosphere had deeply hollowed on the contraction of the liquid volume by cold. The phial was placed under the receiver |