U. S. NATIONAL MUSEUM 



BULLETIN 173 PLATE 27 



Feed-water Injectors. 



1. Giffard injector, 1860 (model; U.S.N.M. no. 309368). See p. 127. 

 2. Sellers exhaust feed-water heater hijector (cutaway; U.S.N.M. no. 309561). See p. 132. 



