Excerpt from The Use of Formalin in Neurology
On immersing a field mouse and certain organs in a four per cent. Solution, he became convinced that they were hardened as well and more quickly than when alcohol was used.
Hermann (16) finds no especial advantage nor disadvantage in the use of formalin over other fixing agents; indeed he believes that for section methods the after-treatment with alcohol is some what deleterious to the tissue.
F. Blum (6) discusses Hermann’s paper. J. Blum (7) used formol in two per cent. Solutions upon some fishes and a lizard and found them to harden in a very short time and to preserve their form and color unchanged; the latter condition being due to the fact that the mucin of the mucus-secreting animals remains transparent in formalin.
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