No abstract

867icism. This unique feature suggests hematopoietic tolerance. In anticipation of skin allograft studies to demonstrate immunologic tolerance between twin marmosets, skin autografts were attempted. A successful technique for fitted skin grafts to the chest emerged from the consideration of hair-growth phase, graft size and site, surgical anesthesia, control of 'infection, and mechanical protection. Of a series of 50 consecutive autugrafts reported, 48 survived.We wish to express our thanks to Gretchen Humason for her work in preparing the histologic sections; we are indebted to and thank Ralph Hall, D. V. M., for his assistance with the eIectroanesthesia instrument. We also wish to thank Tolm Smith, Mark Brewer, and James Kline for (their technical assistance in handling and maintaining the animals.