By the Roman period brass was being deliberately produced from metallic copper and zinc minerals using the cementation process and variations on this method continued until the mid 19th century.

The cementation process continued to be used but literary sources from both Europe and the Islamic world seem to describe variants of a higher temperature liquid process which took places in open-topped crucibles.

As the forests of Britain and Europe continued to be over-harvested to supply the keels of larger wooden boats, and the Bessemer process ( patented in 1855 ) cheapened the cost of steel, steel ships and boats began to be more common.

Other complications continued to stall the EU negotiating process, most notably Slovenia's blockade of Croatia's EU accession in 2008 – 2009.

The industrialization process and transportation in Colombia were affected by the internal civil wars that surged after the independence from Spain and that continued throughout the 19th and 20th centuries.

The Betancur administration in turn questioned the M-19's actions and its commitment to the peace process, as it continued to advance high profile negotiations with the FARC, which led to the creation of the Patriotic Union ( Colombia ) ( UP ), a legal and non-clandestine political organization.

The Colombian Government and ELN in early 2001 continued discussions aimed at opening a formal peace process.

Eastern Orthodoxy and Protestantism do not believe in Purgatory as such, though the Orthodox Church is willing to allow for a period of continued sanctification ( the process of being made pure, or holy ) after death.

It began to brighten gradually in the 1700s and has continued to brighten to the present day ; this is part of the process of stellar evolution.

The Western process of forming effective and impersonal bureaucracies, developing efficient tax systems, and integrating national territory continued into the 20th century.

This process is continued until the players reach the green.

The Central American Common Market continued its dynamic reactivation process, now with most regional commerce duty-free.

In practicality, the process continued to a certain extent.

Although the extraction process, using low-temperature gas liquefaction, was not developed in time to be significant during World War I, production continued.

He was continued a process begun by his mother and brothers helping to establish foundations who brought reform to Scottish monasticism based on those at Cluny and he played a part in the organisation of diocese on lines closer to those in the rest of Western Europe.

The process was gradual rather than swift: a strong Egyptian presence continued into the 12th century BCE, and, while some Canaanite cities were destroyed, others continued to exist in Iron I.

It does not reflect any notable developments in the printing process around the year 1500, and many books printed for a number of years after 1500 continued to be visually indistinguishable from incunables.

The process continued over time, and in 1206, for example, a special commission was used to determine borders in the Munster area.

And again, this gradual process continued as individuals having a slightly shrunken aperture of the eye had an advantage over those without the mutation as an aperture increases how collimated the light is at any one specific group of photoreceptors.

The process continued in the modern period with extension of shorelines and building of artificial islands for industrial and port development, such as Port Island in Kobe and the new Kansai International Airport in Osaka Bay.

As he slowly continued analyzing Tycho's Mars observations — now available to him in their entirety — and began the slow process of tabulating the Rudolphine Tables, Kepler also picked up the investigation of the laws of optics from his lunar essay of 1600.

He continued by discussing the preface: " despite its obvious undependability as a guide to the actual process of the poem's composition, the preface can still, in Wheeler's words, lead us ' to ponder why Coleridge chose to write a preface ... ' What the preface describes, of course, is not the actual process by which the poem came into being, but an analogue of poetic creation as logos, a divine ' decree ' or fiat which transforms the Word into the world.

Each year another grade is added to the process, until finally all 12 grades are integrated.

It was recognized years ago that the transition from daytime to nighttime propagation conditions, and vice versa, is not an instantaneous process, but takes place over periods of time from roughly 2 hours before sunset until about 2 hours after sunset, and again from roughly 2 hours before sunrise until some 2 hours after sunrise.

This process made the economical manufacture of gears questionable until some way could be found to permit the repeated re-sharpening of gear tooth cutters without the loss of the precision form.

Since the complicated process of establishing new communes and reviewing the rudimentary plan left by the French did not even begin until the fall of 1957, this goal appears somewhat ambitious.

Basically, the foam machines that produce such stock consist of two or more pumping units, a variable mixer, a nozzle carriage assembly, and, in many cases, a conveyor belt to transport and contain the liquid during the reaction process and until it solidifies into foam.

The effect is that the platform returns from an off-level position at a rapid rate until it is nearly level, at which point the platform is controlled by a proportional servo with low enough frequency response so that the noise has little effect on the leveling process.

The process consists in turning the platform manually until the outputs of both accelerometers are zero.

North and south, east and west, back and forth he sailed in the land-locked bay, plowing furiously forward until land appeared, then turning to repeat the process, day after day, week after week.

Huntsman's process was used for manufacturing tool steel until the early 1900s.

The process continues in like manner until 365 heavens are in existence, the angels of the last or visible heaven being the authors of our world.

He was a skilled political administrator and leader, and effectively reversed the decline of the Teutonic Order, until he betrayed it by transforming the order's lands into his own duchy, secularizing it in the process.

Plant and Korner were in the process of recording a full album with Plant on vocals until Page had asked him to join " the New Yardbirds ", aka Led Zeppelin.

Brass was produced by the cementation process where copper and zinc ore are heated together until zinc vapor is produced which reacts with the copper.

# Continue this process until the two records are in sync with each other, it can be difficult to sync the two records perfectly, so manual adjustment of the records is necessary to maintain the beat synchronization.

The dish is so named because it makes bubbling and squeaking sounds during the cooking process, and the cold chopped vegetables ( and cold chopped meat if used ) are fried in a pan together with mashed potatoes or crushed roast potatoes until the mixture is well-cooked and brown on the sides.

Although the process of fermentation was not fully understood until Pasteur's work in 1857, it is still the first use of biotechnology to convert a food source into another form.

In contrast to common law incrementalism, the legislative process is very difficult to get started, as legislatures tend to delay action until a situation is totally intolerable.

This process is repeated, each time with atoms one bond farther from the stereocenter, until the tie is broken.

The process could then be repeated by dividing the resulting smaller interval into smaller and smaller parts until it closes down on the desired limit point.

Intuitively, the process can be pictured as follows: first shrink the real line to the open interval (- π, π ) on the x-axis ; then bend the ends of this interval upwards ( in positive y-direction ) and move them towards each other, until you get a circle with one point ( the topmost one ) missing.

This process continues until all the semolina has been formed into tiny granules of couscous.

" The IBM COMTRAN language invented by Bob Bemer was also drawn upon, but the FACT language specification from Honeywell was not distributed to committee members until late in the process and had relatively little impact.