Once again we have before us a copy of the proceedings of an international meeting on hyperbaric oxygenation. Like the proceedings of the first international congress (JAMA190:1082, 1964) these too are in book form, but with several improvements. The editor has been careful to arrange related papers into useful groups. In a new and developing field which lacks texts and reference manuals, this is the closest thing yet to a handbook. Another improvement is the careful documentation of the discussion which followed each paper. In these discussions, where obviously there was an atmosphere of free give-and-take, the information brought out proves to be both thought-provoking and useful. Any lantern slides that were used at the meetings are reproduced here for the reader's benefit.
Happily there is evidence of increasing attention to basic physiology and biochemistry. For example, studies on oxygen transport, acidbase exchange, cerebral blood flow, induced hemorrhagic