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31Hand grenade — M67 fragmentation grenade, a widely used modern hand grenade. A hand grenade is any small bomb that can be thrown by hand. Hand grenades are classified into three categories, explosive grenades, chemical and gas grenades.[1] Explosive grenades… …
32List of Chinese inventions — A bronze Chinese crossbow mechanism with a buttplate (the wooden components have …
33Gossage — is a family name of soapmakers and alkali manufacturers. Their company eventually became part of the Unilever group. During World War II, all soap brands were abolished by British government decree in 1942, in favour of a generic soap. When… …
34Organ — • A musical instrument which consists of one or several sets of pipes, each pipe giving only one tone, and which is blown and played by mechanical means. Catholic Encyclopedia. Kevin Knight. 2006. Organ Organ …
35Ford Model T — Manufacturer Ford Motor Company Production 1908–1927 Assembly Detroit, US; Highland Park …
36Bicycle brake — Animation of a single pivot side pull calliper brake for the rear wheel of a steel framed road bike. A bicycle brake is used to slow down or stop a bicycle. There have been various types of brake used throughout history, and several are still in… …
37Bicycle brake systems — are used to slow down, or brake a bicycle. There have been various types through history, and several are still in use today.HistoryEarly bicycles such as the high wheeled penny farthing bikes were fitted with spoon brakes. As they were fixed… …
38History of Physics — History of Physics † Catholic Encyclopedia ► History of Physics The subject will be treated under the following heads: I. A Glance at Ancient Physics; II. Science and Early Christian Scholars; III. A Glance at Arabian Physics; IV.… …
39Inventions in medieval Islam — A significant number of inventions were developed in the medieval Islamic world, a geopolitical region that has at various times extended from Al Andalus and Africa in the west to the Indian subcontinent and Malay Archipelago in the east.… …
40Glossary of rail terminology — Rail transport Operations Track Maintenance High speed Gauge Stations …
