Switzer on forcing houses

2045. The next era of improvement may be dated 1717, when Switzer published a plan for a forcing-house, suggested by the Duke of Rutland's graperies at Belvoir Castle. Miller, Bradley, and others, soon after, published designs, in which glass roofs were introduced; and between the middle and the end of the last century, Speechly and Abercrombie in England, and Kyle and Nicol in Scotland, made various improvements in forcing-houses, as to general form, internal arrangements, and mode of heating.