At the same time, the Marquis de Laplace was working on a new theory of creation, which made the earth a little blotch in the nebulous sea out of which the planetary system had been formed and Bunsen and Kirchhoff, by the use of the spectroscope, were investigating the chemical composition of the stars and of our good neighbour, the sun, whose curious spots had first been noticed by Galileo. Meanwhile after a most bitter and relentless warfare with the clerical authorities of Catholic and Protestant lands, the anatomists and physiologists had at last obtained permission to dissect bodies and to substitute a positive knowledge of our organs and their habits for the guesswork of the mediaeval quack. Within a single generation (between 1810 and 1840) more progress was made in every branch of science than in all the hundreds of thousands of years that had passed since man first looked at the stars and wondered why they were there. It must have been a very sad age for the people who had been educated under the old system. And we can understand their feeling of hatred for such men as Lamarck and Darwin, who did not exactly tell them that they were "descended from monkeys," (an accusation which our grandfathers seemed to regard as a personal insult,) but who suggested that the proud human race had evolved from a long series of ancestors who could trace the family-tree back to the little jelly-fishes who were the first inhabitants of our planet. The dignified world of the well-to-do middle class, which dominated the nineteenth century, was willing to make use of the gas or the electric light, of all the many practical applications of the great scientific discoveries, but the mere investigator, the man of the "scientific theory" without whom no progress would be possible, continued to be distrusted until very recently. Then, at last, his services were recognised. Today the rich people who in past ages donated their wealth for the building of a cathedral, construct vast laboratories where silent men do battle upon the hidden enemies of mankind and often sacrifice their lives that coming generations may enjoy greater happiness and health.