8.Further study


Comparison of Powders by SEM(Scanning Electron Microscope):
 No.1 Flour   No.2 Cocoa  cf. [No.3 Potato starch   No.4 Siccarol(Talc)]

We carried out supplemental experiments employing improved 
apparatus using motor driven unit.
 No.1 Friction measurement by a spring scale
 No.2 Improved flour box employing a motor drive
 No.3 Example of faults in a acrylic box
 No.4 Pressure sensor (Piezo electric) to measure the inner stress of powder