TroHsartions Society Nnzvl Architects and Marine Engineers, Vol. 2j, igig. 



To illustrate paper on "Nezv Develof incuts in High P'acnuni .apparatus," 

 by G. L. E. Kotliny, Esq., Member. 



Plate 7 7 



Comparative outlines of twin 1)68111 air pump 

 and air ejector. 



NORHIS PETERS. INC.. LITHO.. WASHINGTON. D. C. 



