All the men from one college were no longer taken together, but each class was examined separately and _vivâ voce_; and hence, since all the students comprised in each class were of about equal attainments, it was possible to make the examination more effective. Richard Watson, of Trinity, claimed that this change was made by him when acting as moderator in 1763. He said[41]: There was more room for partiality ... then [_i.e._ in 1759] than there is now; and I attribute the change, in a great degree, to an alteration which I introduced the first year I was moderator [_i.e._ in 1763], and which has been persevered in ever since. At the time of taking their Bachelor of Arts' degree, the young men are examined in classes, and the classes are now formed according to the abilities shown by individuals in the schools. By this arrangement, persons of nearly equal merits are examined in the presence of each other, and flagrant acts of partiality cannot take place. Before I made this alteration, they were examined in classes, but the classes consisted of members of the same College, and the best and worst were often examined together. It is probable that before the examination in the senate-house began a candidate, if manifestly placed in too low a class, was allowed the privilege of challenging the class to which he was assigned. Perhaps this began as a matter of favour, and was only granted in exceptional cases, but a few years later it became a right which every candidate could exercise; and I think that it is partly to its development that the ultimate predominance of the tripos over the other exercises for the degree is due. In the same year, 1763, it was decided that the relative position of the senior and second wranglers, namely, Paley, of Christ's, and Frere, of Caius, was to be decided by the senate-house examination and not by the disputations. Henceforward distinction in that examination was regarded as the most important honour open to undergraduates. In 1768 Robert Smith, of Trinity College, founded prizes for mathematics and natural philosophy open to two commencing bachelors. The examination followed immediately after the senate-house examination, and the distinction, being much coveted, tended to emphasize the mathematical side of the normal university education of the best men. Since 1883 the prizes have been awarded on the result of dissertations[42]. Additional prizes, awarded at the same time, and associated with the name of Lord Rayleigh[43], were founded in 1909.