Condensed Milk and Milk Powder: 



187 



Flff. 58. The Campbell milk drier 



I A concentrating vessel, a outlet, b valve, c hot water jacket, c 1 hot 

 water pipe, c 2 discharge of jacket, B air pipe, e connecting hose, f stand 

 pipe, g air-distributing disc, t air chamber. — II E pug mill, i cylinder, j hop- 

 per, k chute, 1 horizontal shaft, m blades for stirring, m' projections for 

 scraping blades, F Vermicelli-machine, n hopper, o cylindrical chamber, 

 p piston, q spiral screw, q' worm-wheel, o' small holes, r endless traveling 

 apron, s tray with perforated bottom. — III G drier, t body of drier, H 

 blower, t' flue, u opening to insert trays, u' opening for removing trays, 

 vv endless chains' with projections for supporting trays, w coil heater, 

 w' pipe circulating hot water. 



5. The Merrell-Gere Process. — The milk is condensed in the 

 vacuum pan to about one third to one fourth its volume. The con- 

 densed but still fluid milk is forced under pressure through a fine 

 jet, causing it to be atomized and sprayed into a current of hot air, 

 in an evaporating chamber. This atomized liquid forming a mist, 

 offers the maximum surface for evaporation of its water. The hot 

 air absorbs the moisture of the milk almost instantly and the milk 

 drops to the bottom of the chamber in the form of a snow-like pow- 

 der. No grinding is necessary. This process was invented by L,. C. 

 and I. S. Merrell and W. B. Gere, assignors to Merrell-Soule Co., 

 cf Syracuse, N. Y., and patented July 23, 1907. The following are 

 the claims of the patentees: 



