Notes on expense of manufacturing iron

[Notes, calculations, costs etc/S Goodrich, re] Expense of Manufacturing Iron at Woolwich. [Bears data given by Mr Venning, the yard's Master Smith; draft letter, Jul 8, London to Navy Board/S Goodrich, re same, concluding that the difference in cost between Woolwich and Portsmouth is due to the latter operating on a much larger scale night and day; account, Jul 7, Woolwich Yard/O Lang, John Peake, S Goodrich, showing changes from report of Jul 1 re cost of manufacturing iron at Woolwich in 1826-27]