1887.] 421 



mum, thus permitting much greater accuracy of the record received. At 

 the same time the point attached to the receiving diaphragm has a positive 

 motion in both directions, and can thus more correctly reproduce the 

 characteristic quality of the spoken words. 



In any phonogram record made in a direction at right angles to the 

 record surface, the fact that the resistance to impression does not increase 

 in the same proportion as the depth of the impression will prevent the 

 record from agreeing closely with the original tones. Loud tones must 

 therefore fail to impress their characteristic quality on the phonogram- 

 record, as correctly as more feeble tones. 



Mr. Berliner prepares his receiving surface as follows ; A plate of glass 

 is covered with a layer of printers' ink, and then held in the smoky flame 

 of a coal oil lamp and covered with a uniform layer of soot. On the sur- 

 face thus prepared the stylus or point attached to the transmitting dia- 

 phragm, makes its record of a uniform depth. It then only remains to fix 

 the record so obtained. This is accomplished by the simple expedient of 

 flowing the plate with any ordinary quick drying varnish. From this 

 plate the sound can be directly reproduced, or a copy of it can be made 

 on any desired metal. 



There are three ways in which the reproduction may be made, viz : 



1st. By the simple process of mechanical engraving. 



2d. By chemical deposition. 



3d. By photo-engraving. 



This latter process is preferred by the inventor, the chromo-gelatine 

 process being generally adopted. 



The Committee on the Michaux Legacy presented a report, 

 accompanied hy the following resolution, which was, on mo- 

 tion, adopted: 



" Resolved, That the sum of $200 be expended under the supervision of 

 the Michau.K Committee, for the expenses of lectures of Prof. Rothrock, 

 to be delivered in the Chapel of the University of Pennsylvania." 



The committee appointed October 21, 1887, to examine into 

 the scientific value of the newly invented language, Yolaplik, 

 and to report thereon, presented its report, which, after dis- 

 cussion, was, on motion of Mr. Wmsor, made the special order 

 for the next meeting of the Society, and the Secretaries were 

 requested to have it printed and distributed among the resident 

 members for inspection. 



And the Society was adjourned by the President. 



