ABSTRACTS OF TECIIXICAL ARTICLES 343 



severely industrial atmosphere, and in a similar atmosphere, but ac- 

 celerated by additional rainfall simulated by a water spray. These 

 data show that zinc and zinc alloy coatings corrode at a slower rate than 

 cadmium coatings. However, under the accelerated exposure the 

 difference is not so pronounced. 



Telei'isiov in Color from Motion Picture Film.^ Herbert E. Ives. 

 In speculations on the possible uses for television, one project which 

 receives considerable attention, partly because of its relative ease of 

 accomplishment, is the transmission of images from motion picture 

 film. It is true that the practical simultaneity of event and viewing, 

 which is the unique offering of television, is lost when the time necessary 

 for photographic development of the film intervenes. Nevertheless, 

 it is conceivable that if this delay is small, television from film may still 

 possess such an advantage over the material transportation of film as to 

 give it a real field. A further possibility, more remote, but within the 

 range of legitimate speculation, is that television apparatus may some- 

 time be used to receive, in the home, motion pictures of the sort now 

 offered in the theatres or in home projection outfits. Howe\-er distant 

 these mergings of the two arts may be, the technical problems presented 

 are pretty clearly defined, and offer interesting features for study. 



Among these problems, and perhaps the farthest cry of any, is the 

 transmission of images in color from colored motion picture film. This 

 paper describes a method of accomplishing this, using the receiving 

 apparatus for television in color recently described, and special sending 

 apparatus which utilizes the latest form of colored moving pictures 

 — the ridged film now marketed under the name of Kodacolor. 



Private-Wire Telegraph Service.' R. E. Pierce. An important 

 part of the entire communication service of the United States is de- 

 voted to private wire service. More than one and one-half million 

 miles of private wire telegraph service is furnished to press associations, 

 brokers, financial houses, public service companies, and other organiza- 

 tions and individuals. Some of the interesting features involved are 

 described here. 



Absolute Amplitudes and Spectra of Certain Musical Instruments and 

 Orchestras.^ L. J. Sivian, H. K, Dunn, and S. D. White. In a 

 paper on "Speech Power and its Measurement," one of the authors 

 has given some measurements of average and peak amplitude in speech, 



6 Jour. Op. Soc. Amer., Jan., 1931. 



-I Elec. Ewgg., Jan., 1931. 



» Jour. Acous. Soc. Amer., Jan., 1931. 



