1891.] NEW YORK ACADEMY OF SCIENCES. 103 



After the reading of these papers the Section adjourned and 

 Prof. Allen again took the chair. 



Mr. C. a. Post was proposed as a Resident Member. 



The following committees have been formed by the Council : 



On Nominations — The entire Council. 



On the Library — Messrs. Allen, Britton, Cox, Julien, 

 and Newberry. 



On Publications — Messrs. Allen, Bolton, Casey, Martin, 

 Newberry, and Rees. 



On Public Lecture Course — Messrs. Bolton, Julien, and 

 Trowbridge. 



March 9th, 1891. 

 Stated Meeting. 

 Vice-President Dr. Hubbard in the chair. 

 About fifty persons present. 

 Tlie following paper was read : 



adaptation of the arc light to projections. 



by L. H. LAUDY, PH.D. 



(Abstract.) 



The introduction of electricity into the business of life is one 

 of the noteworthy features in the history of the civilization of 

 the nineteenth century. 



It is true that before 1850 science had discovered nearly all 

 the facts upon which the present industrial applications of elec- 

 tricity depend, and the laws and principles had all been an- 

 nounced at a much earlier date. Most of us are familiar with 

 the galvanic battery, the magneto-electric machine, the telegraph, 

 and the electroplating bath, bat at that time so limited was the- 

 application and so small the current necessary that the world 

 would hardly have felt the loss if by some strange accident the 

 agent had disappeared. 



To-day thegreat industries and business centres depend largely 

 upon electricity for the transmission of sound, telegraphic com- 

 munication, light and power; and the enormous demands made 

 upon it, and the important position that it occupies in the in- 

 dustrial arts, are convincing proofs that it has come to stay. 



