My Confusion about Volta’s Confusion

In Chapter 6 (page 199, paragraph 2), I gave an uncharitable description of Volta’s initial mistake in identifying the cause of electric current. In the Spanish edition, the paragraph reads:

“Volta and Galvani had each committed a similar error. In their efforts to localize the cause in either the metals or the frog, they changed the experimental conditions and observed a different effect. When Volta eliminated the frog or any conducting fluid between the dissimilar metals, he observed a momentary transfer of electric charge but not a continuous electric current. When Galvani eliminated the dissimilar metals, his vigorous swinging of the frog caused muscle injury, which stimulated the nerve and caused contractions. But his original experiment had involved no such injury; it had been a simple hop-step, not a swing dance.”