The conventions of this representation, head tilted, lips slightly parted, large-eyed, curling hair cut in locks grazing the neck, were developed in the 3rd century BCE to depict Alexander the Great.

The barge and canal system contended favorably with the railways in the early industrial revolution prior to around the 1850s – 1960s for example, the Erie Canal in New York State is credited by economic historians with giving the growth boost needed for New York City to eclipse Philadelphia as America's largest port and city but such canal systems with their locks, need for maintenance and dredging, pumps and sanitary issues were eventually outcompeted in the carriage of high-value items by the railways due to the higher speed, falling costs, and route flexibility of Rail transport.

Prior to the development of the pound lock in 984AD in China by Chhaio Wei-Yo and later in Europe in the 15th century, either flash locks consisting of a single gate were used or ramps, sometimes equipped with rollers, were used to change level.

Flash locks were only practical where there was plenty of water available.

On more modern canals, " guard locks " or gates were sometimes placed to allow a section of canal to be quickly closed off, either for maintenance, or to prevent a major loss of water due to a canal breach.

Greek engineers were the first to use canal locks, by which they regulated the water flow in the Ancient Suez Canal as early as the 3rd century BC.

River navigations were improved progressively by the use of single, or flash locks.

To break out of the limitations caused by river valleys, the first summit level canals were developed with the Grand Canal of China in 581 – 617 AD whilst in Europe the first, also using single locks, was the Stecknitz Canal in Germany in 1398.

In time, projects were devised in Virginia, Maryland, Pennsylvania, and elsewhere. The modern Erie Canal has 34 locks, which are painted with the blue and gold colors of the New York State Canal System.

The locks were on a large scale, most having a change of level of.

The innovative features of the Gatling gun were its independent firing mechanism for each barrel and the simultaneous action of the locks, barrels, carrier and breech.

:" I call your own kind self to witness [...] the last pages of Heart of Darkness where the interview of the man and the girl locks in — as it were — the whole 30000 words of narrative description into one suggestive view of a whole phase of life and makes of that story something quite on another plane than an anecdote of a man who went mad in the Centre of Africa.

For example, when the computers at MIT were protected either by physical locks or login programs, the hackers there systematically worked around them in order to have access to the machines.

The enlargement projects were completed by the installation of two larger canal locks in Brunsbüttel and Holtenau.

Along the intervening stretch of the river a series of locks and weirs were built.

Of the numerous locks that were proposed, only thirteen were completed ; Locks 1 to 11 on the stretch downstream of Mildura, Lock 15 at Euston and Lock 26 at Torrumbarry.

The first locks on the river were built in 1825 at Louisville to circumnavigate the falls.

Pankratiasts were highly skilled grapplers and were extremely effective in applying a variety of takedowns, chokes and joint locks.

LSD, Sunroof, rear rock guard were optional, manual windows and locks, standard M030 suspension.

The maximum allowed vessel size is slightly smaller: long, wide, and deep ; many vessels designed for use on the Great Lakes following the opening of the seaway were built to the maximum size permissible by the locks, known informally as Seawaymax or Seaway-Max.

Originally flintlocks, Halls later were made as or converted to percussion locks.

Girls who were about to be married offered locks of their hair to him.

Instead, the canal was built with wooden locks which were subsequently destroyed in a heavy storm in 1811.

He subsequently improved the harbors of Oswego, New York, Philadelphia, and Long Island Sound and constructed locks and dams on the Cumberland and Tennessee rivers.

Parts of it, including the Churchbridge flight of locks, were subsequently destroyed by opencast coal mining, and have since been re-developed.

All bills bearing the American locks were to be returned and subsequently destroyed.

He subsequently settled at Marlow where he regularly rowed his skiff through the locks.

He subsequently distributed smaller locks to friends, including, in 1784, J. B. Greenwood, also of Trinity College, from whom it came to the Library.

Strap buttons are sometimes replaced with " strap locks ," which connect the guitar to the strap more securely.

The original four locks here were replaced in 1819 by five shallower ones to alleviate problems with water supply to the nearby paper mills.

It remained in use until 1934 and, although the upper two locks have been replaced by sluices and Geldeston lock is derelict, the Environment Agency have negotiated with local landowners to allow use by canoes and unpowered vessels which can be portaged around the locks.

Above the locks, a section at Burton was drained because of problems with leakage, and a pipe replaced the canal, so that the water supply to the lower canal was maintained.

A new cut at Brighouse was added in 1780, while the two staircase locks at Salterhebble and the single lock at Brooksmouth were replaced at Smeaton's suggestion by three new locks in 1782.

They rebuilt all of the locks, and replaced the remaining staunches with locks.

All locks were replaced, and the total cost was over £ 60, 000, of which around £ 20, 000 was for the Selby Canal.

The original locks at Kippax and Lemonroyd were replaced by a single lock at Lemonroyd.

Many of the locks are still present along the canal route ; however, the lock gates have been replaced on the upstream side with small dams and water outfalls.

Five new locks, each 61 m long, 13. 5 m wide and 2. 7 m deep replaced the original seven locks.

He recommended that the staunches should be replaced by pound locks, and that several new cuts should be made.

Some on the locks, such as Hommerton Lock and Pickett's Lock, were built on new sections, while others, such as Stanstead Lock, replaced an existing flash-lock.

Flintlock weapons based on this design were used for over two centuries, until they were finally replaced by percussion locks in the 1840s and 1850s.

The lift at Tardebigge on the Worcester and Birmingham Canal was replaced by locks in 1815 as it was " too complex and delicate ", according to Rennie.

Finally, another lift at Camden Town on the Regent's Canal was replaced by locks in 1815 because it could not be made to work.

The locks had previously been replaced with members own locks and a march was planned.

Fir wood was originally used for these locks, but this decayed very quickly and was replaced at Sonning by oak in 1787.

The original narrow locks, replaced by three wide beam ones in the 1930s, are still there alongside.

They replaced six narrow locks in 1930, the remains of which can still be seen to one side of the channel, and are the last wide locks before Birmingham.