No J0551. 



Rheostats. Some Testimonials as to Experimental Switchboards. 



129 



50 549. 1 : 8. 



01 ffl) l&\ 



v 



50 550. 1 : 10. 



50551. 1:12. 



50.548. Lamp Resistance of 3 Glow Lamps (cf. Figure), with 1 screw plug for Edison s. d. 

 sockets and 2 m lamp cord; for currents to 3 amperes at 110 volts 0. 18. 



In ordering please state network voltage. 



50.549. - The preceding, with 6 lamps, for currents to 6 amperes at 110 volts . . 1. 4. 



50.550. Lamp Resistance with 12 Glow Lamps (Figure), for fixing to the wall, the holders 



being mounted on marble; for currents to 12 amperes at 110 volts 3. 0. 



In ordering please state network voltage. The sockets have switches. 



50.551. --The preceding, with 40 Glow Lamps. The sockets are fixed to wood. For 

 currents to 40 amperes at 110 volts. All lamps to be put in parallel ; 5. 10. 



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4 Some Testimonials as to Experimental Switchboards (Translated). 



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C h r u d i in, 22nd August 1908. 



From six months' experience of the use of the switch- 

 board supplied by you, we are glad to express our entire 

 satisfaction with it as regards the faultless working of the 

 fittings. The rheostat and measuring instruments have 

 been constructed with great precision; and the whole 

 arrangement is constructed in such an elegant manner that 

 yonr switchboard is quite an ornament in our Physics 

 Lecture Koom. 



Direction of the Girls' Lyceum. 

 Stanislav Kalandra, Physics Master. Jiri Klima, Rector. 



Montevideo, 19<h Au. 1908. 

 I am pleased to inform you, and I am sure you will 

 be interested to learn, that the system and construction 

 of your switchboard are perfectly satisfactory, in particular 

 cu account of the facility with which electrolytical analyse- 

 are carried out by its aid, which renders only low current- 

 densities necessary for getting the maximum of regulation 

 when the shunt system is employed. 



Chemical Institute of the Faculty of Medicine 

 of the University. 



Offenbach a. M.. 30'h March 1908. 

 With reference to the switchboard supplied about 

 :1 , year back (which has proved satisfactory), kindly quote, 

 etc . etc . . . 



Techn. Lehranstalt, Faohlehrer Trabert 



Bern bur <:. 10'h December 1907. 



I take this opportunity of informing you that we are 

 very pleased with the switchboard. 



P, Nouvel, Herzogl. Karl-Realgymnasium. 



8 z a r v a s (Hungary), 4 th November 1907. 

 I cannot refrain from expressing to you how pleased 

 we are with the switchboard by reason of the multiplicity 

 of its uses and its absolute reliability. 



Director Joh. Schulek, Evangel. Obergymnasium. 



Sat mar (Nemeti), 20't> July 1907. 

 WP have received the switchboard made by you and 

 submitted it to a test to our satisfaction. 



Director Joh. Perenyi, Lehrerbildungsanstalt. 



Bonn, 9'h February 1907. 

 The switchboard supplied has proved satisfactory. 



Privatdozent Dr. Becher. 

 Philosoph. Seminar der Kgl. Universitfit. 



Innsbruck, 17 th September 1906. 



You have rendered a great service to our institution 

 by complying with the wishes of the professors in sending 

 plans and descriptions to the contractors while the buildings 

 were in the rough. The internal equipment, carried out 

 later, is excellent The work tables, wall cupboards, spe- 

 cimen boxes, Arendt experimental table with switchboard 

 and rectifier, the stink cupboards, blackboard frame, 

 microscope table, etc. are all constructed in a workman- 

 like manner and work thoroughly well. 



Our school is continually being visited by professors 

 (German and foreign), and your work has evoked unstinted 

 surprise. 



Ernst Pechlaner, 

 Professor of Chemistry, Commercial Academy. 



Cl. 71.5261.5071. 



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