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EDUARD UHLENHUTH 



but not simultaneously with each other. In experiment 31 

 the network of the host and graft was formed fourteen days 

 earlier than in host and graft of experiment 32, while the spots 

 separated nine days later than in experiment 32. This result 

 can be understood if we assume that the development of network 

 and spots of the grafted skin was determined by the new hosts. 



In experiments 9-10, no notes were made on the development 

 of the network. The spots of host and graft developed ten 

 days earlier in experiment 10 than in experiment 9. 



In experiments 39-40, the network of the grafts again de- 

 veloped as if the rate of development would be determined by 

 the respective hosts. In graft and host of experiment 39 it 



