It seems Milgram did not follow the experimental specifications exactly as given on Wikipedia. The "tissue damage" exchange is mentioned further down on the Wikipedia page and comes from Milgram's own anecdotal recollections of the experiment.
If this is the case, it seems that he improvised rationalizations as needed to get the subjects to continue administering shocks. This strikes me as rather sloppy on his part. (...not that I think the numbers would have been all that different had he not done this.)
If this is the case, it seems that he improvised rationalizations as needed to get the subjects to continue administering shocks. This strikes me as rather sloppy on his part. (...not that I think the numbers would have been all that different had he not done this.)