Calculations of Time

LEFT  Francis Hall, An explication of the Diall sett up in the Kings Garden at London 1669, in which very many sorts of Dyells are conteined , by which, besides the Houres of all Kinds diversely expressed, many things also belonging to Geography, Astrology and Astronomy are by the Sunnes shadow made visible to the Eye, Liege 1673.

RIGHT The Hour Glass; seen here in an advert dated September 1945 for the Joyce Machine Company to demonstrate the importance of getting a product to market on time. In the copy it is stressed that domestic goods now freed from the demands of war production will demand timely delivery.