Equilibrium between living and dead forces, condition of, R. H. Fauntleroy, xlvii, 241.f
Equinoxes, precession of, vii, 323f; viii, 132, 139.f
Equiseta, N. American, A. Braun's monograph, with additions by G. Engelmann, xlvi, 81.
Equisetum arvense, xlvi, 83.
— boreale, xlvi, 90.
— eburneum, xlvi, 84.
— giganteum, xlvi, 91.
— hyemale, xlvi, 89.
— lævigatum, xlvi, 87.
— limosum, xlvi, 86.