Geum, species of, iv, 64; xlii, 35.
Geysers, remarks on, G. Bischof, xxxvi, 255.
— of Iceland, siliceous concretions from, xxxi, 167; xxxii, 196.
Gibbes, L. R., on the resistance of fluids, xxvii, 135.
Gibbon, J. H., visit to the salt works of Zipaquera, xxxii, 89.
Gibbs, G., on the dry rot, ii, 114.
—, method of augmenting the force of gunpowder, i, 87.
—, connexion between magnetism and light, i, 89.
—, on the tourmalines and other minerals of Chesterfield, Mass., i, 346.