Seed drill further refined by Jethro Tull in 1701 in the Agricultural Revolution. However, seed drills of this and successive types were both expensive and unreliable, as well as fragile. Seed drills would not come into widespread use in Europe until the mid to late 19th century, when manufacturing advances such as machine tools, die forging and metal stamping allowed large scale precision manufacturing of metal parts. Early drills were small enough to be pulled by a single horse, and many of these remained in use into the 1930s. The availability of steam, and later gasoline tractors, however, saw the development of
Thomas Howard (1651–1701) he had three sons and a daughter. Only one son survived him, dying the year after him aged 14. His daughter Diana married (in 1703) Edward Ward, 8th Baron Dudley and 3rd Baron Ward, who died in 1704, leaving her pregnant with a posthumous son, who succeeded his father in the Dudley estates, but died in 1731 without issue. Thomas Howard (1651–1701) Thomas Howard (1651–1701) was the only surviving son of Sir Robert Howard of Ashtead, Surrey. He served as a Teller of the Exchequer from 1689 until his death, a post that provided him with a house at Westminster.