MANUFACTURE OF MILK PowbER 295 
conveying the dry powder into a suitable collecting space away 
from the air or gas current, and discharging the air or gas sepa- 
rately from the dry powder. 
2. "The process of obtaining the solid constituents of liquids 
and semi-liquids, in the form of powder, which process consists 
in concentrating the substance by removing a large percentage 
of water therefrom, converting the concentrated mass into a 
spray, bringing such spray into a current of dry heated air or 
gas having an avidity for the moisture of the substance treated, 
retaining the atoms momentarily in said current so that sub- 
stantially all the remaining moisture is converted into vapor 
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Fig. 101. The Merrell-Soule milk drier! 
and the product is prevented by the cooling effect of such evap- 
oration from undergoing chemical change, conveying the dry 
powder into a suitable collecting space away from the vaporizing 
current, and discharging the air or gas separately from the dry 
powder.” 
The Merrell-Soule Co. are operating numerous powdered 
nulk factories, with headquarters in Syracuse, N.Y. This com- 
pany has subjected the spray-drying process to much experi- 
mental study in efforts to perfect the process and to improve 
the quality and keeping properties of the product. 
Obviously, during the life of the Stauf patent, which ex- 
pired January 29, 1918, no one could make milk powder by the 
spray-drying process, whether from milk uncondensed, or from 
‘ 1From Plaintift’s Record in the U. S. District Court. Merrell-Soule Co, 
vs. Rico Milk Products Co. 
