170 LOCAL SCIENTIFIC SOCIETIES. pursuit, but chiefly fitted to be a pleasing pastime for the young ; there was as yet no intellectual thirst for scientific know- ledge sufficient to create a demand for a special literature. I am of course leaving out of account for the moment the ardent students and the earnest investigators and teachers who were engaged in laying the foundations of scientific education and research. For the majority, however, especially those who lived out of reach of the great towns and Universities, and beyond the personal influence of the few inspired workers and teachers, there were as yet no books which would enable them to acquire the rudiments of real scientific knowledge at home or by individual effort. It was not easy even for those who had a personal interest in some scientific subject to ascertain what progress was being made at the great centres of discovery and research. It was only at a much later period, after the stimulus had been supplied by the British Association, and by the Local Societies (whose rapid increase was no doubt due in a great measure to the influence of the British Association), that a real thirst for information made itself felt, and created a sufficiently widespread demand for a new class of scientific literature. This resulted in the appearance of a number of excellent cheap text-books of elementary science, designed to give a certain amount of sound general knowledge and to stimulate the desire for more, and for a considerable time these continued to fulfil precisely the object for which they were intended. If the day of the shilling primers, each including a whole science, seems now to have closed, we must allow that in their time they played a very important part in the history of science in the British Isles. Written by acknowledged leaders of thought, they challenged the attention of educated and intelligent people to whom perhaps science had not meant much before. They were written for and read by those who had not received any advanced scientific training, and who would not have found else- where the sort of information that they needed, presented in so instructive a manner. But by fostering the desire for more accurate and detailed knowledge these primers contributed perhaps to their own extinction, for with the increase of special training and the dissemination of expert knowledge they have been more and more supplanted by the educational text-book used in schools, and the specialist treatise which is now put into the hands of the advanced student. In other words, as scientific literature has become more highly organised it has fallen more and more into the hands of specialists. This is, no doubt, the merest commonplace to all whom I am addressing ; but the conclusion that I wish to draw is that from the point of view of the amateur this is to be regretted ; for he can no longer get an adequate insight into the