Abstract
Experimental animals are widely used in research work with various infectious diseases. In order to know the influence of infection upon animals, it is a useful procedure to measure the body weight and the size of internal organs. Although, it should be essential to compare the data with those obtained with normal animals, a reliable data of normal ones are not available as yet.
In this connection, the authors started to establish such a picture with normal mice. Male ddD and CFW of from 1 to 65 days' old bred in the author's laboratory were used.
The results are as follows:
1. The periodical increase of weight of each organ was not similar. Organs of a mouse increased in weight after birth but the curves were different one another.
2. The increase of body weight and that of the weight of internal organs do not necessarily coincide.
3. In spleen, a decrease of weight was noted after certain period of time.
Further studies are being undertaken using otherstrains.
