RT Journal T1 THyroxine. JF Archives of Internal Medicine JO Archives of Internal Medicine YR 1929 FD June 1 VO 43 IS 6 SP 891 OP 891 DO 10.1001/archinte.1929.00130290162011 UL http://dx.doi.org/10.1001/archinte.1929.00130290162011 AB This is a useful monograph on the physiology and pathology of the thyroid gland with particular emphasis on the history of the chemical isolation of the active thyroid hormone, thyroxin. The emphasis on the chemical phase comes naturally from the author, Dr. E. C. Kendall, who has done valuable work on the isolation of the hormone. The long list of references will be useful to physicians and investigators who want to go more deeply into the controversial phases of the problem of the thyroid gland than Dr. Kendall has done in the present work. The book is clearly written and is therefore easy reading. Here and there the author goes far a field in speculation, but usually he indicates to the reader that he is on speculative ground. Dr. Kendall states that "thyroxine bridges the gap between living protoplasm and the expression of what may be called personality or temperament.