Prefatory remarks by G. R. Gliddon.
Letter from Lieut. A. W. Habersham.
Letter from Prof. L. Agassiz.
Letter from Prof. J. Leidy.
On the distribution and classification of tongues, by A. Maury.
Iconographic researches on human races and their art, by F. Pulszky.
The cranial characteristics of the races of men, by J. A. Meigs.
Acclimation, by J. C. Nott.
The monogenists and polygenists ... with an inquiry into the antiquity of man, viewed chronologically, historically and palæontologically, by G. R. Gliddon.
Commentary upon the principal distinctions observable among the various groups of humanity, by G. R. Gliddon.
On the geographical distribution of the Simiæ in relation to that of some inferior types of men, by G. R. Gliddon.