the predecessor to the connecting rod is the mechanical linkage used by roman-era watermills.the earliest known example of this linkage has been found at the late 3rd century hierapolis sawmill in roman asia modern turkey and the 6th century saw mills at ephesus in asia minor modern turkey and at gerasa in roman syria. the crank and connecting rod mechanism of these machines converted the .
the locks on the chesapeake and ohio canal, located in maryland, west virginia, and washington, d.c. of the united states, were of three types: lift locks; river locks; and guard, or inlet, locks. they were numbered from 1 to 75, including two locks with fractional numbers 63⅓ and 64⅔ and none numbered 65.
a carburetor american english or carburettor british english is a device that mixes air and fuel for internal combustion engines in the proper air–fuel ratio for combustion. it is sometimes colloquially shortened to carb in the uk and north america or carby in australia. to carburate or carburet and thus carburation or carburetion, respectively means to mix the air and fuel or to equip .
in water-powered mills, a sluice gate opens a channel, starts the water flowing, and a water wheel turning. in 1787, american inventor oliver evans revolutionized this labor-intensive process by building the first fully automatic mill using bucket elevators, screw conveyors, and the hopper boy to spread, cool, and dry the meal between grinding and bolting. this was the first time that anyone .
pitting corrosion, or pitting, is a form of extremely localized corrosion that leads to the creation of small holes in the metal. the driving power for pitting corrosion is the depassivation of a small area, which becomes anodic while an unknown but potentially vast area becomes cathodic, leading to very localized galvanic corrosion.
ailanthus altissima / eɪ ˈ l æ n θ ə s æ l ˈ t ɪ s ɪ m ə /, commonly known as tree of heaven, ailanthus, varnish tree, or in chinese as chouchun chinese: 臭 椿; pinyin: chòuchūn; literally: 'foul smelling tree' , is a deciduous tree in the family simaroubaceae. it is native to both northeast and central china, as well as taiwan.unlike other members of the genus ailanthus, it is .
knife crime in the west midlands is the highest outside london. at a-level in 2010, the consistently best performing area was herefordshire where most a-level candidates attend hereford sixth form college. dudley is also above the english average; the other metropolitan boroughs have low-to-average a-level pass or high mark proportions .
a lock is a device used for raising and lowering boats, ships and other watercraft between stretches of water of different levels on river and canal waterways.the distinguishing feature of a lock is a fixed chamber in which the water level can be varied; whereas in a caisson lock, a boat lift, or on a canal inclined plane, it is the chamber itself usually then called a caisson that rises and .
stainless steels do not suffer uniform corrosion, like carbon steel, when exposed to wet environments. unprotected carbon steel rusts readily when exposed to the combination of air and moisture. the resulting iron oxide surface layer the rust is porous and fragile. since iron oxide occupies a larger volume than the original steel this layer .
the chronicle of the expulsion of the greyfriars latin: cronica seu brevis processus in causa expulsionis fratrum minoritarum de suis cenobiis provincie dacie, danish: krønike on gråbrødrenes udjagelse, or gråbrødrenes fordrivelseskrønike is a historical writing on the reformation in denmark between 1527 and 1532 when the franciscans were forced to leave denmark.