Miscellaneous papers concerning chronometers, including the ownership of chronometers; certificates for chronometer makers; the advantages box chronometers have over pocket chronometers on steam ships; the injury of chronometers; printed rates of the chronometer M.R. Parkinson and C. Frodsham 2110 from 1 November 1838 to 29 February 1840; a copy of the 'Mechanics' Magazine', 23 February 1839; a circular from E.J. Dent issued after the dissolution of the company Arnold and Dent, stating his credentials and soliciting patronage; and notices of the days when the Time Ball did not function.