Agriculture in the United Kingdom sixfold by 1650. Improvements in transport, particularly along rivers and coasts, brought beef and dairy products from the north of England to London. The Kingdom of Great Britain was created on 1 May 1707, as a result of the Acts of Union putting into effect the terms of the Treaty of Union. At this time, Jethro Tull, a Berkshire farmer, had recently invented his famous rotating-cylinder seed drill. His 1731 book, "The New Horse Hoeing Husbandry", explained the systems and devices he espoused to improve agriculture. The book had such an impact that its influence can still be seen in
Down-the-hole drill for the DTH method underground, where the direction of drilling is generally upwards instead of downwards. In "DTH" drilling, the percussion mechanism – commonly called the hammer – is located directly behind the drill bit. The drill pipes transmit the necessary feed force and rotation to hammer and bit plus compressed air or fluids for the hammer and flushing of cuttings. The drill pipes are added to the drill string successively behind the hammer as the hole gets deeper. The piston strikes the impact surface of the bit directly, while the hammer casing gives straight and stable guidance of the