Note 56 — Chapter XXIII · DIRECT AND DEFINITE ACTION OF THE EXTERNAL CONDITIONS OF LIFE.
Reading edition
‘Proc. Acad. Nat. Sc., Philadelphia,’ June 16th, 1874, and July 23rd, 1875.
Reading edition
‘Proc. Acad. Nat. Sc., Philadelphia,’ June 16th, 1874, and July 23rd, 1875.