I. Extract of Memoir read in 1878 before the Anthropological Institute; II. Generic Images, extract from Lecture in 1879 to Royal Institution; III. Memoir read in 1881 before the Photographic Society.
[B. THE RELATIVE SUPPLIES FROM TOWN AND COUNTRY FAMILIES TO THE POPULATION OF FUTURE GENERATIONS]
Memoir read in 1873 before the Statistical Society.
[C. AN APPARATUS FOR TESTING THE DELICACY WITH WHICH WEIGHTS CAN BE DISCRIMINATED BY HANDLING THEM]
Memoir read in 1882 before the Anthropological Institute.
[D. WHISTLES FOR TESTING THE UPPER LIMITS OF AUDIBLE SOUND IN DIFFERENT INDIVIDUALS]
Read in 1876 at the South Kensington Conferences in connection with the Loan Exhibition of Scientific Instruments.
[E. QUESTIONS ON VISUALISING AND OTHER ALLIED FACULTIES]
Circulated in 1880.