126 THE NATIONAL SCIENTIP^IC INSTITUTIONS AT BERLIN. 



The iustitute serves for iiistriictioii iu so far as it aids the lectures on 

 animal physiology, sanitation, etc., by actual demonstration and experi- 

 ments. 



The Zoo-technical Ifhstitnte. — The means by ^Yhich the Zoo-technical 

 Institute expects to succeed, excepting the necessary apparatus, etc., 

 are found in the representations, models, and, as regards sheep- 

 raising, of sami)les of wool. The wealth of the collection and the cor- 

 rectness of the representations render this portion of the museum a 

 permanent animal exhibition, with however the additional advantage 

 that the model does not represent one single act, but that each typical 

 appearance of the agricultural domestic animal has been shown therein. 

 It is a further object of the Zoo technical Museum to keep before the 

 public all possible phases of animal industry of the nation. 



The Institute is in charge of Privy Councellor, Prof. Dr. H. Settegast. 



The Institnte of Geodetic Instruction. — The geodetic collection, 

 founded in 1883, contains ten theodolites (three Mith microscopes), two 

 compass apparatus, eleven levelling instruments, of which two are for 

 exact work having all auxiliary ai)paratus,one sextant, one prism circle, 

 one engineer's table, one Fortin barometer, four aneroids, three Amler 

 planimeters, two precision planimeters, two pantographs, apparatus 

 for the examination of the above instruments, demonstration apparatus, 

 and surveying apparatus. Available for instruction are further a geo- 

 detic library, a collection of plans, and a series of forty- two wall-dia- 

 grams representing geodetic instruments. 



The surveying exercises are — during the summer — executed in the 

 open air ; in winter, indoors in a large hall which has been constructed 

 for the purpose. Two large rooms are used iu geodetic computations 

 and drawing; adjoining these is the room of the assistant, which con- 

 tains the collection of plans, and that of the professor, which contains 

 the library. 



Division of Machinery and Models. — The collection, located in a hall of 

 the ground floor, consists of measuring apparatus, actual machines, or 

 models. Among the latter may be mentioned the Eausch models ex- 

 hibited in the southern vestibnle and show the historical development 

 of hand imj)lemeuts and of the idow. TLe requirements of instruction 

 and of i^ractical use determine the enlargement of the collections ; the 

 additions, therefore, confine themselves principally to elements of con- 

 struction and to apparatus for the testing of useful machinery. 



A collection of serviceable machinery in complete w^orking order is 

 employed for instruction. For that puri)ose an engine of 35 horse- 

 power has been mounted in the hall. A water reservoir located in the 

 hall contains a pulsometer, a centrifugal i^ump, an open archimedian 

 screw, an overshot and an undershot wheel. Exhibitors have free use 

 of si)ace for terms of six months; the articles exhibited are published 

 annually in the Deutsche landwirthschaftliche I'resse. The space will 



