THE death of Mr. G. F. Deacon, a member of the council of the Institution of Civil Engineers, and (eminent for his scientific work in engineering, was announced in last week's NATURE. Mr. Deacon, during his comparatively short life—he died at the age of sixty–six—obtained a considerable reputation as, a water-works engineer, and is best known by his connection with the Vyrnwy Reservoir for the supply of Liverpool. In 1876 the need had arisen for an additional supply of water, and Mr. Deacon, who was then acting as municipal and water engineer, was instructed by the corporation to make an investigation as to the locality from which an additional supply could be obtained. After a survey of several sources he finally advised that this could be best obtained from the River Vyrnwy, a tributary of the Severn, situated in North Wales. Mr. Deacon's recommendation was submitted to Mr. Thomas Hawksley and Mr. Bateman, who approved this choice. The Bill promoted by the corporation having received the sanction of Parliament, Mr. Deacon was appointed joint engineer with Mr. Hawksley to prepare the plans and carry out the work. When trie works were about half finished, Mr. Hawksley retired, and Mr. Deacon was left in sole charge.