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The filter foam apparatus was first tested using the ramp state function used in the velocity gradient experiments. 
Figure 2: Head loss through the foam as a function of time
The data collected for this experiment is close to the results that were expected based on the calculations done in MathCAD using the Hagen Pouiselle equation to approximate the head loss across the filter foam. The spike in the data could have been caused by a clog in the filter foam, and more experiments will be run to confirm this.