Mr. M‘Neill was so completely occupied with his large works in the construction of railways that he could give only a general superintendence to the school, and on the 5th of November, 1842, Mr. Henry Rennie, formerly a lieutenant in the Royal Engineers, was appointed Assistant Professor and Lecturer. After holding the office for two years he resigned, and Mr. Thomas Oldham, B.A., was appointed in his room. Doctor Apjohn was elected to the joint Professorships of Chemistry and Geology; but in 1843 it was found necessary to appoint a distinct Professor of Geology, and on December 30th, 1843, Mr. John Phillips, the eminent geologist, was elected to this chair at a salary of £200, to be increased to £400 on the death of Doctor Whitley Stokes, then an old man, which took place in 1845. In the latter year Mr. Phillips resigned the Professorship, and he was succeeded by Mr. Thomas Oldham, afterwards Director of the Geological Survey of India. In 1846 Mr. Samuel Downing was appointed to the Professorship of Engineering, which he continued to hold until his death in 1882. It was soon found that a two years’ course in Engineering was insufficient, and in 1845 it was extended to one of three years. The studies of the first year are in the main theoretical; in the second and third years they are practical--viz., drawing and office work, levelling, surveying and general engineering, and chemistry as taught in the laboratory. At first, diplomas in Engineering were granted to students who had passed successfully through this school. In 1860 it was resolved by the University Senate that in lieu of these the license of the University should be conferred publicly at the Commencements; and in 1872 it was further resolved that the degree of Bachelor in Civil Engineering should be created, and that it should be conferred on Bachelors of Arts who were entitled to the license by having completed the full course in Engineering. From the year 1860 to 1891 inclusive, 352 students obtained degrees and licenses in Engineering. The degree of Master of Engineering is conferred on those who, after taking the degree of Bachelor of Engineering, have practised for three years in the work of their profession. At each final examination in Engineering, special certificates are awarded to students who answer in a distinguished manner in the following subjects:--I. Practical Engineering; II. Mechanical and Experimental Physics; III. Mining, Chemistry, Geology, and Mineralogy.