Bahr has nut, the last stone into the building of the atomic structure by combining in the most ingenious Ruthorford's theory of the tom with the quantum theory, thereby explaining not only the constitution of the atoms and their complicated "structures of many' akalls of electrons, but also of the nest complicated spect of light but also of Br. de Jonge terminated his lecture by describing Millican's ingenious method of measuring the photo-electric effect, which intact tan be called a workshop in vacuo. 'A vacuum tube are contains three notals of the alkali group—sodium, Potassium and lithium, At these combine readily with the oxygen of the air, the air had to be excluded. Inside the tube are a rotating table and a rotating knife. With the knife a fresh cut is taken from the metals mention-fed and the clean cut it then subjected to light or X-rays, the electric charge being measured anc found to be in complete agreement with the theory.
Both the chairman, Dr. Chaltey, as well as the speaker thanked to Frot. Robertson, of the Y.M.CA. for kindly lending the necessary equipment for the lecture.
Text read from the printed page and cleaned; old type leaves the occasional error.