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.
