When at the time of the Disruption the theological chairs were resigned by the professors who seceded to the Free Church, the classes of the new College which that church established in Edinburgh were held in a house next door to a well-known dentist. Dr. Chalmers was one of those who had left the University, and he had an enthusiastic body of students in the new rooms. The applause with which they greeted the Professor’s bursts of eloquence proved, however, rather trying to the dentist and his patients, for the house partitions were none of the thickest. The story is told that a polite note was sent to Dr. Chalmers, asking whether it would be possible for him to moderate the noise made by his pupils. Next day the doctor, before beginning his lecture, explained the circumstances to his class, and begged them to remain quiet, ‘for,’ he added, ‘you must bear in mind that our neighbour is very much in the mouth of the public.’ The late Professor Tait, so widely known and so affectionately remembered, used to cite one of the answers he received in a class-examination. The question asked was, ‘Define transparency, translucency and opacity,’ and the following was the answer. ‘I am sorry that I cannot give the precise definition of these terms. But I think I understand their meaning, and I will illustrate it by an example. The windows of this class-room were originally transparent; they are at present translucent, but if not soon cleaned, they will become opaque.’ The professor, in repeating this reply, laughingly said that he had allowed the man full marks for it. [Sidenote: OLD TYPE OF DOMINIE]