69 



262. Photograph, framed, with plans of the zoolo- 

 gical station at Naples. 



Lent by A. G. Dew Smith. 1876. 



263. Natural History diagrams for use in -Austrian 

 schools. Price, unmounted, Is. 3d. each. 



. Given by E. Pick. 1880. 



III. BOTANY. 



A. APPARATUS. 



264-. Germinating apparatus, designed by Prof. F. 

 Cohn, Breslau, for the simultaneous germination of a large 

 number of seeds, or for the cultivation of microscopical 

 organisms at a constant degree of temperature and 

 moisture. 



From the Institute of Vegetable Physiology, University 

 of Breslau. 



E. 252. 1877. 



This apparatus satisfactorily replaces the germinating apparatus 

 of Nobbe. The seeds are soaked for 24 hours in water, then 

 200 are placed in each earthenware dish and covered over. The 

 enclosed tin dishes are then filled with water, which keeps in 

 the porous clay dishes the moisture requisite for the develop- 

 ment of the seeds. The space between the double walls of 

 the chamber is now filled three-quarters full with water (the 

 height of the water can be seen by the glass gauge), and a small 

 gas flame, governed by a Bunsen's regulator and placed under- 

 neath the germinating chamber, keeps the temperature very 

 constant. This apparatus is used for the examination of the ger- 

 minating power of agricultural seeds, which takes place at the 

 laboratory for experiments on seeds (" Samen-Oontroll Station ") 

 connected with the Institute of Vegetable Physiology. Similar 

 apparatus of different sizes are used in this station continually 

 for the culture of plants, especially microscopical growths, at a 

 constant temperature. They were employed especially by Prof. 

 Cohn in his researches on Bacteria. 



265. Incubator, designed by Prof. Babe, for the 

 purpose of maintaining fungi or other organisms at a 

 constant temperature. 



E. 28. 1887. 



The apparatus consists of a sheet-iron case with double walls 

 and a glass door. The space between the walls is filled with 



