460 



Acoustics. 



No. 53 086 



53 586. 1 : 8. 



53 587 B. 1:4. 



53588. 1:10. 



53589. 1 : 10. 



53.586. Vowel Apparatus after von Helinholtz, as No. 53,585, but larger, Figure, with s ' 

 10 harmonic tones TO. o. <> 



53.587. Telephone after Ph. Keis, consisting of transmitter (Fig. 53,587 A) and receiver 



(Fig. 53,587 B) 4.0.0 



Between the transmitter and receiver called by Reis himself tin- reproducing apparatus a ' 

 battery is so inserted that both are traversed in series by the current. The strength of the current 

 should be such that the armature of the small magnet on the transmitter is attracted: .'i to 4 Bunscn 

 cells or accumulators are sufficient for the purpose according to the distance lietwecn both stations. 



Further Telephones see Section "Electricity". 



53.588. Large Edison Phonograph for Wax Cylinders, F i g 11 r e. with recorder and reproducer 

 for speeches, musical selections, etc., with clockwork in base, with one recording and 



one reproducing membrane, and one sound horn 6. '_'. 



Given in with the phonograph are 1 blank record anil 1 record with nm-ieal Delect ion. Tin- a;>p;ratus 

 can be set into action without any previous knowledge or special skill, both for recording and reproducing 

 -peeches. songs, etc. Tne reproclnel ion is so loud that it is possible to hear cuc'i uord plainly, even in sonirs. 

 in a large room 10 x 10 m. Kadi cylinder can be used many hundreds of time-. 



Cl. 1177. 3fi71, 1178, 

 117(1, I.', U. 



