the active marmot, the discharge of water from the lungs is smaller, and greater variations occur in the respiratory quotient than in the rabbit. During hibernation, the discharge of water is still less ; the respiratory quotient sinks to 0.53, so that the animal gains in weight. During the awakening, increased muscular activity (shivering) is seen, and metabolism becomes more active especially in relation to fats and carbohydrates ; the temperature rises ; so does the respiratory quotient. The

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... discharge of moisture is only slightly augmented, SO that the proportion of carbon dioxide to water may be as high as 16; in the active animal this number is 3. Cheyne-Stokes respiration is frequently seen when the torpidity is not profound. By MAURICE NICLOUX (Compt. rend., 1901, 133, 67-69).-Observations on animals show that the amount of carbon monoxide in foetal and maternal blood is equal when the air breathed by the mother contains small quantities of the gas. When the percentage of the gas in the air is raised so that it is fatal, the amount in the foetal is much less than in the maternal blood. Dissociation of the carboxyhsmoglobin is believed to occur in the placenta, By MANFRED BIAL (Chem. Centr., 1901, ii, 315 ; from Arch. Anat. Physiol., 1901, 249--255).-The formation of sugar in the living and ' surviving ' liver is attributed to its production from glycogen by the diastatio ferment of the lymph. HOFFMANN (Zeit. anal. Chem., 1901, 40, 450--459) .-An average of ten estimations showed that 100 grams of egg-yolk contain 12 milligrams of iron oxide, or I egg without shell 1.8 milligrams. By feeding the hens on haemogallol or ferrohzemol, the liver contains more iron, so also do the eggs ; the hsemogallol comparatively poor in iron acts best, the amount rising by a few milligrams. By feeding with copper preparations (cuprohaemol), no copper goes into the egg. By PAUL Compare this vol., ii, 28).-During the secretion of saliva induced by stimulation of the chorcla tympani nerve, the oxygen taken from the blood by the submaxillary gland is three or four times greater than that taken by the resting organ.