Equipment of the Class Rooms. 



lamp taking more than 25 amperes), this must be taken into account accordingly. The wiring for 

 the general lighting of the room should be installed independently of the above. 



The same stipulation, viz., that the wires for the general lighting and those for 

 the experimental tables should be quite independent of each other, holds good in 

 regard to the gas piping. 



In case local special regulations as to the construction of the water supply and to the kind of 

 piping have to be considered (employment of jacketted pipes or galvanised iron piping), we would ask 

 that this be stated in all orders. 



It is very desirable to place all orders as early as ever possible since towards the close of the 

 building season they often accummulate so that in the case of orders reaching us late it is not possible 

 to meet all wishes at the proper time, notwithstanding the extent of our factory and the largo 

 staff at our disposal. 



In addition to the objects of equipment catalogued in the present list (which are generally 

 ample for the requirements of a well equipped secondary school, ordinary private schools and colleges) 

 we are in a position to supply complete equipments for the physical and chemical Lecture Rooms and 

 Laboratories of Universities, Technical High Schools, Veterinery Colleges, Academies of Agriculture and 

 Forestry, for Technical Institutes, Industrial Works, etc., and will gladly give all information required 

 and submit estimates, if desired, as well as send references to work of the kind already carried out. 



We have supplied such installations to the following, among others: The Chemical Institute 

 (Prof. Emil Fischer), Berlin; Hofmann-Haus, Berlin; Laboratory for Applied Chemistry at Leipzig 

 University (Prof. Beckmann); Physical Institute at Leipzig University (Prof. Wiener); In- ' : 

 stitute for Chemical Technology of the Technical High School at Charlottenburg (Prof. Otto iS T . Witt); 

 Chemical Institute of the Charlottenburg Technical High School; Physical Institute of the Technical : 

 High School, Danzig-Langfuh'r (Prof. Max W i e n) ; Chemical Institute of the Technical High School, 

 Danzig-Langfuhr (Prof. Otto Ruff); Chemical Institute of Tubingen University; Chemical Institute > 

 of Kiel University (Prof. Harries); Physical Institute of the Physical Society at Frankfort-on-the- Q 

 Main, and many others. 



Advice as to the Arrangement of the Class Rooms. 



9 



CD 



ts 



In drawing up plans for the erection of a new school, the following points should be taken 

 into consideration in respect of the class rooms for Physics and Chemistry: p 



The rooms are best arranged on a raised ground floor, on account of the better draught in the ^ 

 chimneys, the more convenient inlet and outlet of the water, also because of the higher water-pressure 

 and the greater solidity of the floor. 



It is only when great importance is attached to the use of the heliostat 

 and when buildings or trees in front prevent the admission of the sun, that the physics rooms should 

 be situated on a higher floor. The rooms for physics should, also on account of the heliostat, face 

 south, or else the south-east or south-west. In view of the fact, however, that all 

 optical experiments can be carried out with an electric projection lantern, and a very beautiful carbon 

 spectrum obtained, such great value has not been ascribed in recent times to the heliostat. Plate I 

 (bound in with Page 3) contains a ground plan of the class rooms as they can be arranged in 

 the most practical manner in a modern high school or in a secondary school, Class rooms, preparation 

 rooms and collection rooms are arranged at the window side. The folding doors in the preparation 

 room are exactly opposite so that the continuation of their centre line ends by the side of the lecture 

 bench and the transport of apparatus, especially when a travelling table is employed, is 

 greatly facilitated; such a table is then a prolongation of the lecture bench and has 

 the advantage that it can be brought behind and in front of the experimental bench and also trans- 

 ported to other rooms. The folding doors must however have n o pieces raised above the floor. It 

 is also possible in this arrangement of doors to have rails laid on which the table can more conveniently 

 travel. The wall separating the class room from the preparation room has in the centre besides the 

 doors referred to, a hollowing for the draught uptake. The preparation room and the general class 

 room have their own entrances from the corridor, so that during hours of study the other teacher of 

 physics may make his preparations. 



