| 摘要 |
<p>The testing apparatus comprises a pair of substantially rectangular trays having identical external dimensions including an outwardly extending peripheral flange. One tray is provided with a single substantially rectilinear trough and the other tray is provided with a plurality of spaced cavities each of which has a depth identical to the depth of the trough. A cover member is provided with a plurality of depending prongs spaced in a manner complementary to said cavities and a depending peripheral flange complementary to the flanges on said trays to space the ends of the prongs an identical distance from the bottom of said trough and the bottom of said cavities when said cover flange rests on the respective tray flange. The bottom of each prong is provided with a concave recess to facilitate the transfer of a drop of liquid from said trough to the respective cavity.</p> |
