On a piece of chalk <1868>--The problems of the deep sea <1873>--On some of the results of the expedition of H.M.S. "Challenger" <1875>--Yeast <1871>--On the formation of coal <1870>--On the border territory between the animal and the vegetable kingdoms <1876>--A lobster: or, The study of zoology <1861>-Biogenesis and abiogenesis <1870>--Geological contemporaneity and persistent types of life <1862>--Geological reform <1869>--PaAEontology and the doctrine of evolution <1870>
