301. The school of gardeners established by the Prussian Horticultural Society consists of several classes, according to the time which they may have been in the institution. In an examination of this society, in 1827, it appeared that the pupils had made great progress in botany and drawing; their knowledge of geography, including the physical description of the earth, which they receive from Professor Dittman, proved very respectable. Not less had they profited by Dr. Bergmann's lectures on chemistry and mineralogy. They also produced themes on the subjects of their instruction, and the diaries, which they are taught to keep, were mostly executed in a satisfactory manner. Their answers to all the questions as to the practical cultivation of plants, vegetables, and flowers, were good, and their general conduct had been such, that there had been no punishment inflicted in the establishment for the whole year. Under these con-siderations, all the pupils were forwarded to the next class at Potsdam, with the exception of one, who was returned on account of his youth and bodily weakness. The examination of sixteen pupils, who had been transferred to this school, during the two preceding years, from the establishment of the Schonberg, was equally satisfactory. With the exception of one, the pupils had invariably displayed steadiness of conduct and industry in their studies. The seven pupils of the second class are practically trained by the royal gardeners of the palace; besides which they are theoretically instructed in the cultivation of vegetables and trees, in arithmetic, algebra, and drawing in its different branches. The nine pupils of the third class are taught as follows:� 1. A continuation of instruction on the culture of fruit and other trees. 2. On forcing gardening (treib-gartnerey). 3. Geometry, with practical surveying and measuring. 4. Continuation of instruction in botany. 5. Drawing plans and laying out kitchen-gardens, orchards, and pleasure-grounds, with a calculation of the expenses. 6. Themes on the most important subjects connected with gardening. In all these branches the progress of the pupils, in 1827, had been satisfactory; and three of the number were discharged, as competent gardeners, with permission to seek employment in the royal gardens, for their further improvement. The remaining six were admitted into the fourth class, as garden artists (garten kunstlerer).