56 HERBERT SPENCER entitled, " A theory of population, deducttl jt-mn the genera! law of animal fertility**; his life-work was the Synthetic Philosophy, One of George' Eliot's witticisms made game of Spencer's aptitude for generalisation. He had been explaining his disbelief in the critical powers of salmon, ind his aim in miking flies "the best average representation of an insect buzzing on the surface of the water," " Yw»," she said, "you have such a passion for generalising, you even fish with a generalisation." And this ex- actly describes what he spent much of hw life in doing. Mr Francis Galton has graphically anted his im- pression, that Spencer's composite mental photo- graphs, in forming a generalisation, or in using a general formula-term, were many times multiple of those of ordinary mortals, A composite mental photograph from a small number of intellectual negatives yields a blurred outline—a woolly idea, with ragged edges and loose ends—bat t composite mental photograph from ft very large number of im- pressions, yielded, in Spencer1! case, t generalisation which was crisp and well-defined. Some one has said that Ruskin had the most analytic mind in modern Christendom: that Spencer had one of the most synthetic minds can hardly be questioned. 3, It was one of the open secrets of Spencer's power that his analytic tendency wts almost equal to his synthetic tendency, « Bath subjectively and ob- jectively, the desire to build up wts accompanied by an almost equal desire to delve down to the deepest accessible truth, which should serve is an unshakable foundation*" "It appears that in the treatment of ad reached," (Auto*