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Many of these writers, notably those starred, have written monographs upon their respective subjects and are among the highest authorities in their specialties. The volume has been increased by about 2 0 per cent. over the fourth edition and r e p resents the very latest and best work upon those subjects. While it may be of advantage in some cases to have books unbound (geheftet) yet the writer feels, particularly in books which are sent for review, that these a t least should be bound, so thatdoi:10.1021/ja01970a016 fatcat:fhi4u7po6vfm3plpmvmmxp5qgu