P. 6, line 3, read — Sulphur, Carbon, and Phosphorus in the organism are not present free, but as integral parts of organic combination. Sulphur and Carbon are contained in albumen Carbon in the carbo-hydrates (such as sugar, starch), and in the products of the metamorphoses of organic substances. P. 7, after line 7, read — Phosphorus is contained in the lecithin and in the nuclei. The sulphur of the albumen becomes oxidized by the oxygen of the air breathed, and is turned into sulphuric acid. The latter combines With the bases of the carbonates, and turns into sulphates by driving off the carbonic acid.