On the Advisableness of Improving Natural Knowledge. (A Lay Sermon delivered in St. Martin's Hall, on the evening of Sunday, the 7th of January, 1866,
and subsequently published in the Fortnightly Review)
A Liberal Education: and Where to Find It. (An Address to the South London Working Men's College, delivered on the
4th of January, 1868, and subsequently published in Macmillan's Magazine)
Scientific Education: Notes of an After-Dinner Speech. (Delivered before the Liverpool Philomathic Society in April 1869,
and subsequently published in Macmillan's Magazine)
On the Educational Value of the Natural History Sciences. (An Address delivered at St. Martin's Hall, on the 22d July, 1854,
and published as a pamphlet in that year)
On the Study of Zoology. (A Lecture delivered at the South Kensington Museum, in 1861, and subsequently published by the
Department of Science and Art)
On the Physical Basis of Life. (A Lay Sermon delivered in Edinburgh, on Sunday, the 8th of November, 1868, at the request
of the late Rev. James Cranbrook; subsequently published in the Fortnightly Review)
On a Piece of Chalk. (A Lecture delivered to the Working Men of Norwich, during the Meeting of the British Association, in 1868.
Subsequently published in Macmillan's Magazine)
On Descartes' "Discourse Touching the Method of Using One's
Reason Rightly and of Seeking Scientific Truth." (An Address to the Cambridge Young Men's Christian Society, delivered
on the 24th of March, 1870, and subsequently published in Macmillan's Magazine)