After an interval of about three years, Berg has found it necessary to issue a second edition of his work on the vitamins. He states that during this time over 5,000 larger and smaller articles have appeared on the nutritional factors and closely related fields. There is no work on this subject which contains such a wealth of literature and bibliographic references. There are in all almost 100 pages devoted to a consideration of the literature, comprising some 3,450 references, an increase of 1,900 over the first edition.
The title of this work is somewhat misleading, as a large part of it is devoted to subjects other than the vitamins. For example, there are chapters on the biologic value of the proteins, on the importance of the mineral constituents and on conditions affecting growth. One of the most interesting chapters is that which considers mineral metabolism. As is well known,