| abstract |
An apparatus and method of testing and classifying materials which contain agglutinates includes mixing samples of the material with one or more reagents, and subjecting the resulting mixtures to at least two agitation operations in a cup-shaped container. One such operation is carried out at high speed to disperse macroagglutinates and the other at low speed to settle the agglutinates in the center of the cup-shaped container. By inspection of the containers after the agitation operations, and by inspection of comparison samples of the materials in question, properties of the materials under test may be deduced. The principal use of the method is in blood type and group determination. Apparatus is also provided for automatically carrying out the above method. |