On a piece of chalk (1868. A lecture delivered to the working men of Norwich during the meeting of the British Association.--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. A lecture delivered at the Philosophical Institute, Bradford).--On the border territory between the animal and the vegetable kingdoms (1876. A Friday evening lecture delivered at the Royal Institution).--A lobster, or, The study of zoology (1861. A lecture delivered at the South Kensington Museum).--Biogenesis and abiogenesis (1870. The Presidential Address to the meeting of the British Association for the Advancement of Science at Liverpool).--Geological contemporaneity and persistent types of life (1862. Address to the Geological Society on behalf of the President by one of the Secretaries).--Geological reform (1869. Presidential address to the Geological Society).--Palæontology and the doctrine of evolution (1870. Presidential address to the Geological Society)
