do not illustrate blue print reproductions but should be seen as illustrative only white spaces represent through openings and the white circle in each corner are bores used when assembling several plates the bores of all plates will line up such that screw means or other clamping means may be arranged in the thus created through opening each plate has an extension in the dimension not visualized in the drawing which will correspond to the height of the manifold channel etc the plates of fig7 a and fig7 b are used to form the coupling between separate layer multipliers sandwiching a plate of fig7 d between two plates according to fig7 c of which one is flipped as compared to the view of fig7 c will form a layer multiplier meaning that only two types of plates are needed in order to form the main operational portion of the layer multiplier three if the element of fig7 b is counted when using this construction it is obvious that there should preferably be an even number of splitting channels for each lateral half of the layer multiplier for reasons of symmetry in the embodiment of fig6 and 7 the number is 6 yet other embodiment embraces the use of 2 4 8 or splitting channels per half although other numbers are possible too the suggested number of.