Test protocol and viewing rack holding 10x20 test tubes for the hemolytic reactions in a cattle blood typing test. This is an intermediate stage between the 20 tubes copper racks used orginally in Dr. Irwin and Dr. Stormont's laboratories and that presently used as plastic plates. The complete test for 40 cattle required 2400 tubes or more.

A sample viewing of the settled hemolytic reactions in the cattle test. The complete reaction show red with no visible red cells remaining. Lack of reaction shows a settled button of red cells with clean white "saline" above.

Aventuras I