But in the Middle Ages things were done differently. A wise man said to himself, “I have discovered a great truth. I must impart my knowledge to others.” And he began to preach his wisdom wherever and whenever he could get a few people to listen to him, like a modern soap-box orator. If he was an interesting speaker, the crowd came and stayed. If he was dull, they shrugged their shoulders and continued their way. By and by certain young men began to come regularly to hear the words of wisdom of this great teacher. They brought copy-books with them and a little bottle of ink and a goose quill and wrote down what seemed to be important. One day it rained. The teacher and his pupils retired to an empty basement or the room of the “Professor.” The learned man sat in his chair and the boys sat on the floor. That was the beginning of the University, the “universitas,” a corporation of professors and students during the Middle Ages, when the “teacher” counted for everything and the building in which he taught counted for very little. [Illustration: THE MEDIÆVAL LABORATORY] As an example, let me tell you of something that happened in the ninth century. In the town of Salerno near Naples there were a number of excellent physicians. They attracted people desirous of learning the medical profession and for almost a thousand years (until 1817) there was a university of Salerno which taught the wisdom of Hippocrates, the great Greek doctor who had practised his art in ancient Hellas in the fifth century before the birth of Christ. Then there was Abelard, the young priest from Brittany, who early in the twelfth century began to lecture on theology and logic in Paris. Thousands of eager young men flocked to the French city to hear him. Other priests who disagreed with him stepped forward to explain their point of view. Paris was soon filled with a clamouring multitude of Englishmen and Germans and Italians and students from Sweden and Hungary and around the old cathedral which stood on a little island in the Seine there grew the famous University of Paris. In Bologna in Italy, a monk by the name of Gratian had compiled a text-book for those whose business it was to know the laws of the church. Young priests and many laymen then came from all over Europe to hear Gratian explain his ideas. To protect themselves against the landlords and the innkeepers and the boarding-house ladies of the city, they formed a corporation (or University) and behold the beginning of the university of Bologna. [Illustration: THE RENAISSANCE]