The Principles of Psychology

THIS third edition of the I'r-hici-jilcs of Psychology differs from preceding editions, mainly by containing anew division; which, occurs in the second volume, under the title — ee Part VIII. , Congruities." By the preface to ihe first edition, it will be seen that I bad originally intended to write, under the title of "{Summary and Conclusion/7 a division having forifcs purpose <e to bring the several lines of argument to a focus:" believing that t>f the harmony thai, may be shown to subsist between the doctrines elaborated in the respective divisions, is a strong confirmation of their truth." When I began to prepare the second and great ly enlarged edition, I looked forward to fulfilling this intention, which disturbed health bad before obliged me to abandon. Eventually, however, I left the additional part unwritten— partly because tho work had already become too bulky, and partly because 1 thought that, the harmonies I proposed to point out were so conspicuous tluit all readers would perceive thorn. This last reason proved, to bo ill-grounded. Par from recognising the harmonics which I thought conspicuous, sundry cridics have enlarged on the incongruities. In a/ review published in (he Academy For April I, 187;.$, Mr. Henry Hidgwiek speaks of ** the masy inconsistency of his [niy] metaphysical results/' Similarly, a, writer in the fy we fat or for the 21st, of June, 187!», asserts thai. "Mr. Spencer's system has the incurable defect of fundamental incoherence." Prof.…