First volume of notes related to dynamos manufactured by Mather & Platt contains detailed notes on early research worked out in partnership with Dr John Hopkins at the University of Manchester during the 1880s. The volume contains records for the earliest dynamos the company researched developed and manufactured and contain details such as dynamo number, type of dynamo, rating (by number of light bulbs), purpose for which it was manufactured, and results of tests carried out on some of them prior to delivery.