effect on man of breathing air containing 11 per cent. of oxygen, that is, equivalent to air at an altitude of 6000 metres, as measured by the respiratory exchange, is negligible. The Eggs of Acanthias vulgaris. EMIL ZDAREH (Zed. physiol. Chem., 1904, 41, 524--529).-These eggs contain 47 per cent. of dry material, containing inorganic substances, especially phosphates, and probably free metaphosphoric acid. Protarnine is absent ; f a t and