CYT OF SIX GENERATIONS OF THE CLOSEST POSSIBLE INBREEDING 
ts and dwarfs. Geneticists have for some years contradicted this assertion, maintaining that the results of inbreeding 
e intensified in the inbred offspring. The truth of this position is strikingly illustrated by the above photograph of an 
and is here shown slightly les ife-size; the actual measurement can be determined from the metric scale under him. 
2en months he weighed 550 grams, while the stock rats of the same age, bred without regard to consanguinity, average 
rious, it certainly proves beyond all contradiction that, in so far at least as rats are concerned, inbreeding is not necessarily 
neficial. (Fig. 7.) 
