832 SEC. 18. BIOLOGY. 



3860. Glazed Frame, with movable back for demonstrating 

 biological preparations and drawings. The development of rusts. 

 (JEcidiurn Berberidis, Puccinia graminis, Uredo linearis.) 



Dr. F. Co/in, of the Institute of Vegetable Physiology in 



the University of Breslau. 



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 moyable 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. 



67 botanical models, constructed to illustrate the structure of flowers, of 

 cultivated and wild plants, and the natural orders. These models include 



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



ferse, Lineae, Leguminosae, and Gramineae. 



2. Fruit trees of the families Ampelidse, Pomaceae, -Rosaceae, Ribesiaceae, 



and Amygdaleae. 



3. Forest trees, from the families of the Coniferac (Abietineae Taxineae), 



Salicineae, and Cupuliferae. 



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. 



3865. Six Models of Radiolaria, in papier mache. 



V. Fric, Prague. 



3866. Twelve Types of Foraminifera, recent and fossil, 

 representing the system of Carpentre, with a drawing- of each on 

 a large scale. V. Fric, Prague. 



3867. Model of a Human Leg, with sections at intervals ; 

 for use in giving anatomical and snrgical instruction. 



Dr. Pansch, Kiel. 



