A REVIEW of the first edition of Dr. Walker's translation of Prof. Holleman's little book appeared in the issue of NATURE for May n, 1905 (vol. lxxii., p. 28). New experiments have been incorporated ...

THE first edition of Mr. Kingzett's little book has been reviewed already in these columns (vol. xcix, p. 422). The opportunity provided by the demand for a new edition of the book has been taken to ...