Your commission has been strongly impressed with these considerations; it has thought that the process under consideration was sufficiently proved; that it might, even now, be practised habitually in dissecting amphitheatres; and that this has not already been effected, is evidently due to administrative circumstances. Consequently, it has the honour to propose to you to award to M. Gannal a prize of $1600. The members of the commission agreed that it was expedient to recommend my process to the dissecting amphitheatres: their wish is in part accomplished, since, by decision of the central administration of hospitals, the _subjects are henceforward to be subjected, in the capacious chambers of Clamart, to one of the injections, the compositions of which I have given_. This decision will not astonish those of our readers who are aware that M. Serres is charged with the direction of the anatomical arrangements at Clamart; this gentleman, whose works have elevated him to so distinguished a rank, has been long known for the zeal and noble disinterestedness with which he advances all useful discoveries. 2.--_Preservation of subjects of normal anatomy, of pathological anatomy, and of natural history._ As it is my intention to publish hereafter a complete work on the preservation of pieces of pathological anatomy, and of objects of natural history, which, besides the details into which I might enter, would lead me beyond the proper limits of this work, I shall confine myself here to some results obtained during the last three years, and the composition of the liquids derived therefrom. 1. In 1833, I took the thigh and all the organs contained in the abdominal cavity of an infant at full term, and treated them after the manner to be hereafter indicated, and at the present moment, 8th December, 1837, I preserve the pieces in two jars. They display no sensible alteration, and are as fit for study as when first separated from the subject. 2. In 1835, Dr. Beniquet having to pursue some investigations on the brain, he made use of my liquor in order to preserve entire heads, for which he had occasion. After his experiments were finished, he presented to me a head which remained, and which I preserve in my cabinet. It is impossible to detect the slightest trace of change in it. 3. I have preserved unaltered for three months, the head of a Bar, (a species of Silurus,) weighing several pounds; this head has served for dissection. 4. I have preserved leeches and other worms for several years, without perceiving that they had lost any of the characters necessary for the naturalist to know. 5. The same observation applies to the different organs of birds and mammalia: the heads of pheasants plunged, feathers and all, into the preservative liquor, after fifteen days of maceration, present the red colour around the eye of as lively a shade as at the moment of immersion.