•406 PHYSICO-TECHNICAL INSTITUTION IN CHARLOTTENBURG. 



laboratories of institutions for teaching as a rule can offer. These 

 investigations shall be carried out partly b}" officers of the Anstalt 

 and partly, under their oversight, by scientitic guests and vohintary 

 workers. B3' scientitic guests in general are meant the holders of sci- 

 entific positions in the German Empire, who wish to prosecute scien- 

 tific researches, the plan of which they have submitted, and for which 

 they have not at home the necessary appliances. They must be 

 recommended by the State in which the}' reside, and must be accepted 

 by the Curatorium. 



Young men may be accepted as voluntary workers who have proved 

 their ability by scientilic publications. They will undertake researches 

 which have been determined upon by the Curatorium or the director; 

 or they may investigate subjects which they themselves suggest, and 

 whith appear to the director to be practicable and worthy of execu- 

 tion. The scientific results obtained nuist be published only at the 

 discretion of the authorities of the institution, who reserve also the 

 right to publish them in the I'esearches of the Reichsanstalt. Provi- 

 sion is made that volunttiry workers shall not use the institution for 

 })rivate ends nor to obtain patents. 



Th(^ second division of the Reichsanstalt is placed under a director, 

 who is subject to the higher authority of the president. Such a di- 

 rectoi" was considered necessary on account of the special work of this 

 division, as well as because of the intimate relations into which it is 

 brought with many persons engaged in industrial pursuits. He should 

 therefore not only be a scientific man but should at the same time have 

 some technical knowledge of the applications of science. Under the 

 director are placed the permanent heads of the subdivisions of the 

 technical department, one having the oversight of thermometry, one 

 of optics, two of electricity, and one of mechanical measurements of 

 precision. Along with these, and of the same rank and compensation, 

 is the director of the workshop. Under him at present are eight 

 mechanics, and the shop is provided with the finest tools for the execu- 

 tion of the most exact work required bj'^ the institution. For exam- 

 ple, it has a circular-dividing engine that cost $2,500. The founders 

 of the Reichsanstalt foresaw the necessit}' of such mechanical aids for 

 the furtherance of the exact work to be undertaken. They wisely con- 

 cluded that such special constructions and new types of instruments as 

 they might require from time to time could be more conveniently and 

 more cheaply built in their own shop than by private instrument 

 makers. 



III. COST AND MAINTENANCE. 



The following are the official accounts of expenditures for the 

 grounds, buildings, furniture, and instruments for the two divisions, 

 to which are added the yearly expenses: 



