surpass by far those employed by a
former author, Jungeblut4 who observed, in 1937, an inactivating
action of vitamin C upon tetanus toxin. This inactivation,
however, occurred only when the toxin was exposed, in vitro,
to the direct action of ascorbic acid - a phenomenon not due
to the acidity of the medium, since lowering of the pH by
other means (pH 6) did not cause a similar inactivation