IOWA DAIRY SEPARATORS 
are built under patents owned by this company. The patents 
cover the broad right to narrow the strata of milk in the 
blue milk zone and to widen the strata toward the center 
of the bowl where the butter fat is denser. The result of 
this form of construction permits the skimming of low-tem- 
perature milk practically as clean as at normal temperatures, 
and so controls the currents as to absolutely preclude the 
clogging of the separator bowl. 
To know how close a separator can be made to skim 
under adverse conditions is learned practically only by trying 
out an IOWA MACHINE. It is impossible longer to 
have any competing tests between the IOWA and other 
machines, because all separator men know that as a close 
skimmer the IOWA is in a class by itself. 
We will be pleased to furnish an IOWA MACHINE 
for a competing test with any other separator to enable 
you to know the truth of our claims. If you are buying 
cream separators or recommending them, don’t you think 
in all honor that you should know for yourself the com- 
parative skimming efficiency of the different separators? Why 
not test them out? We will furnish the IOWA to set in” 
against other machines. 
IOWA DAIRY SEPARATOR CO., 
WatTERLOO, Iowa. 
