Letter from W J Millar, Secretary of the Institution of Engineers & Shipbuilders in Scotland, 100 Wellington Street, Glasgow, to the Secretary of the Royal Society, London Regarding [Robert] Mallet's recent paper in the 'Proceedings' on the relative bulks of cast iron at different temperatures. This paper was abstracted in 'Nature'. Miller has made similar experiments on the topic, which he wishes to share with the Society. 1 July 1874