blood grouping

At the time of the murder experts only had very basic opportunities open to them, such as blood grouping and serum testing.

First he made sure they were of the same blood grouping, so the transplants would be well-nourished.

As a result of special new tests developed under Dr. Diamond at the Boston Blood Grouping Laboratory, physicians can state with certainty whether the mother has been sensitized and has cause for alarm.

This it will presumably do without difficulty because John and Clara have the same blood grouping.

The Landsteiner blood grouping test is generally accepted by the medical profession.