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NEW BOOKS. of having been the first of a series of other similar studies by different investigators, calls for severe criticism on a number of points. The apparatus used is well-nigh hopelessly inaccurate; it entirely fails to record movements describing certain curves; it cannot register the variations of pressure of the fingers upon the plate; most important of all, it is impossible while using it to make any time-measurements of the least value. The author prints only a few typical results.doi:10.1093/mind/xi.1.404 fatcat:fo7prfooqbfbrfuwpqma3bag3y