his first perth lecture was on 20 june 1904 at st. george's hall, perth resulted in an attendance of 800, with some 300 having to be turned away. that first lecture included demonstration of a large induction coil for the production of "high frequency currents", but there was no reference to either a herzian coil detector or a branly coherer, so it can not be conclusively said that wireless was covered. the lecture was repeated on 23 june at queen's hall, perth (then the largest capacity hall in the state) to try to accommodate the many who had not been able to be granted entry previously. this venue was also used for all the remaining perth lectures. the "second" lecture was given on 25 june and mainly addressed fundamentals of physical chemistry and electricity, but concluded with a brief treatment of wireless: "mr. soddy concluded with an analogous treatment of wireless telegraphy. he gave several examples of electrical resonance, and also an interesting experiment with miniature wireless telegraphy apparatus." it was his third lecture which was of greatest interest in the history of wireless, being entirely devoted to "wireless telegraphy". a comprehensive survey was provided of the theoretical studies of maxwell, the practical experiments of herz and the realisation of the technology by marconi. the demonstrations were properly detailed by solely one journalist versed in the technology: "the radiator which he had on the platform gave a wave a hundred feet long, the hall was about a wave length ... an experiment was then shown in which a wave from the radiator on the platform rang a bell in the back gallery of the hall ... he had on the table a receiving set of instruments as utilised in the lodge-muirhead system of wireless telegraphy, and with these he had seen messages sent over a distance of 45 miles. ordinary telegraph instruments could be adapted to this system. the coherer was of a special type. a steel disc revolved in a pool of mercury covered with a film of oil. in ordinary circumstances the oil insulated the disc from the mercury. a wave coming along broke down the insulation, the two metals cohered and a signal passed through the apparatus into the recorder". the fourth lecture was held on 19 july and addressed the discharge of electricity through rarefied gases (a repeat of a fremantle lecture). the fifth lecture was delivered 22 july and was characterised by the theft of one of the spinthariscopes being circulated amongst the audience. the sixth and final lecture on 23 july addressed primarily geophysical and astronomical matters.