988 SEC. 18. BIOLOGY. 



For lecture-demonstrations of herbarium specimens of morphological prepa- 

 rations, and collections of microscopical drawings and natural objects which 

 elucidate the diseases, &c. of plants, the glass frames with movable back, which 

 are in common use at the Institute of Vegetable Physiology, are exceedingly 

 well adapted. 



3861. 12 Botanical Models of Cultivated Plants. 



Robert Brendel, Berlin. 



3862. 5 Botanical Models of Fruit Trees. 



Robert Brendel, Berlin. 



3863. 5 Botanical Models of Forest Trees. 



Robert Brendel, Berlin. 



3864. 45 Models of Flowers. Robert Brendel, Berlin. 



These 67 botanical models were constructed to illustrate the structure of 

 flowers, of cultivated and wild plants, and the natural orders. They include 



1. Cultivated mono- and dicotyledonous plants, e.g., families of the Cruci- 



ferse, Linese, Legumiuosse, and Graminea;. 



2. Fruit trees of the families Ampelidffi, Pomacea?, Rosaceffi, Ribesiacere, 



and Amygdaleae. 



3. Forest trees, from the families of the Coniferaj (Abietinese Taxinese), 



Salicinese, and Cupuliferse. 



4. Models of the inflorescence of the principal German orders, including 



Ferns and Equisetaceae. 



The botanical models (which are durably made of gutta-percha, papier 

 mache, &c., held together with cane, wires, &c., and painted true to nature in 

 oil colours) are intended to illustrate lectures on the artificial and natural 

 orders, regardless of the seasons, and in systematic order. As the models are 

 made on a more or less enlarged scale, they facilitate the recognition of all 

 the fine and even smallest organs, and the comprehension of the distinguishing 

 characteristics of the structure of flowers by comparison with living plants ; 

 besides, many can be taken to pieces, and are represented in sections. The 

 models, as a means of botanical teaching, were first prepared at the suggestion 

 and under the guidance and direction of Professor F. Cohn, by M. Lohmeyer, 

 who died in 1872, and presented his collection of over 300 models to the 

 Institute of Vegetable Physiology in the University of Breslau. The models 

 supplied by the exhibitor are now prepared directly from nature. 



3864a. Six Photographs (in frame with glass), for demon- 

 strating the consequences of exterior injuries to trees, 



illustrative of the publication and atlas, " tJber die Folgen auperer 

 Verletzungen der Baume." 



Royal Botanical Garden and Museum of the University of 



Breslau, Prof. Dr. H. R. Goppert, Director. 

 3864b. Seven Photographs (in frame with glass), for de- 

 monstrating the effect of frost on trees. 



Royal Botanical Garden and Museum of the University of 



Breslau, Prof. Dr. H. R. Goppert, Director. 

 3864c. Four Photographs (in frame with glass), for de- 

 monstrating the deformed growth of treeSo 



Royal Botanical Garden and Museum of the University of 

 Breslau, Prof. Dr. H. R. Goppert, Director. 



