Before this discovery, it is widely believed that bricks appeared about 3000 years ago in the Western Zhou dynasty since the earliest bricks were found in Western Zhou ruins.

Before Moseley's discovery, the atomic numbers ( or elemental number ) of an element had been thought of as a semi-arbitrary sequential number, based on the sequence of atomic masses, but modified somewhat where chemists found this to be desirable, such as by the great Russian chemist, Dimitri Ivanovich Mendeleev.

Before the actual discovery of mendelevium, the trivalent state was the most stable one in aqueous solution.

Before Leeuwenhoek's discovery of microorganisms in 1675, it had been a mystery why grapes could be turned into wine, milk into cheese, or why food would spoil.

( Before the discovery of quarks, the term " strong interaction " referred to just internucleon interactions.

Before the relatively recent discovery of neurons and their role in pain, various different body functions were proposed to account for pain.

Before the discovery of the ubiquitin proteasome system, protein degradation in cells was thought to rely mainly on lysosomes, membrane-bound organelles with acidic and protease-filled interiors that can degrade and then recycle exogenous proteins and aged or damaged organelles.

Before the discovery of radioactivity, uranium was primarily used in small amounts for yellow glass and pottery glazes, such as uranium glass and in Fiestaware.

Before the discovery of a live coelacanth specimen, the coelacanth time range was thought to have spanned from the Middle Devonian to the Upper Cretaceous period.

Before the discovery of refrigeration, many sushi connoisseurs were at risk of contracting diseases.

Before the discovery of quantum effects and other challenges to Newtonian physics, " uncertainty " was always a term that applied to the accuracy of human knowledge about causes and effects, and not to the causes and effects themselves.

Before announcing the discovery, the foundation first recruits as many of these people as it can.

Before Scheele made his discovery of oxygen, he studied air.

Before the synthesis of ununseptium, none of ununseptium's daughter isotopes were known ; thus, there was no basis for an JWP discovery claim, much less for its recognition.

Before the discovery of tetracycline and chloramphenicol during the latter 1940s, as many as 30 percent of persons infected with R. rickettsii died.

Before the discovery of antibiotics, pure mountain air was thought to be curative for patients with tuberculosis.

Before he reveals this discovery to the other Eternals, Harlan exacts a price, his lover is to be returned to him and both will go back to rescue Cooper.

Before the discovery of Centurion, the tallest known specimen was Icarus Dream, which was rediscovered in Tasmania in January, 2005 and is high.

Before the discovery of Mendelian genetics, one common hypothesis was blending inheritance.

Before the discovery of ribozymes, enzymes, which are defined as catalytic proteins, were the only known biological catalysts.

Before the discovery of iron and sulphur rich water, Harrogate comprised two hamlets, High Harrogate and Low Harrogate, close to the historic town of Knaresborough.

Before the discovery of magnetite in 1727, Kamaishi was little different from any of the other small fishing communities along the coast.

Before its discovery, the taxon was believed to have become extinct during the Miocene ; when it was discovered, it was heralded as a " living fossil ".

Before the discovery of Hyperion, the tallest redwood ever measured was the Dyerville Giant, also in Humboldt Redwoods State Park.

Before the discovery of America, the word Hart was common in surnames.

Before deriving this formula, we explain what we mean by `` problems of this kind ''.

Before hitting the pole, Mr. Stone's car brushed against a car driven by Alva W. Vernava, 21, of 23 Maple Ave., North Providence, tearing away the rear bumper and denting the left rear fender of the Vernava car, police said.

`` Before then, my sales during much of the year had lagged behind 1960 by 20% '', he says.

Before he could pass the river with safety, however, it was necessary to subdue certain fortresses, one of which was for several days vigorously defended by the governor, Yussuf el-Harezmi, a Khwarezmian.

Before the late modern era, the abbot was treated with the utmost reverence by the brethren of his house.

Before the 20th century, most manufactured products were made individually by hand.

Before the creation of the world, God was all by Himself, in a Self-absorbed state.

Before the mention of Alemanni in the time of Caracalla, you would search in vain for Alemanni in the moderately detailed geography of southern Germany in Claudius Ptolemy, written in Greek in the mid-2nd century ; it is likely that at that time, the people who later used that name were known by other designations.

' Before the 2003 invasion of Iraq Dr. Muayad Said described the structure before the filling of the reservoir: ' It has an octagonal body enhanced by alcoves, some of which are blind.

Before the September 11, 2001 attacks, most hijackings involved the plane landing at a certain destination, followed by the hijackers making negotiable demands.

Before the 2007 season began, Vick was suspended indefinitely by the NFL after pleading guilty to charges involving dog fighting in the state of Virginia.

Before the passage of the lex annalis, individuals could run for the Aedileship by the time they turned twenty-seven.

Before the start of each AFL match, players run through a banner constructed by supporters.

Before the actual process of cell death is precipitated by enzymes, apoptotic signals must cause regulatory proteins to initiate the apoptosis pathway.

Before her, erotica written by women was rare, with a few notable exceptions, such as the work of Kate Chopin.

It ran for 63 performances and was followed two years later by The Day Before Spring.

Living first in Philadelphia, then seeking refuge close in Virginia, he wrote a book entitled The Prospect Before Us ( read and approved by Vice President Jefferson before publication ) in which he called the Adams administration a " continual tempest of malignant passions " and the President a " repulsive pedant, a gross hypocrite and an unprincipled oppressor ".

Before this, cities and counties of sufficiently large populations such as most of Metro Atlanta already had Sunday alcohol sales at bars and restaurants, with local ordinances to abide by, such as having a certain amount of food sales in order to be opened and serve alcohol.

In a glowing review for his " Consumer Guide " column published by The Village Voice, Robert Christgau wrote: " Before minstrelsy scholar Eric Lott gets too excited about having his title stolen.

Baseball Before We Knew It: A Search for the Roots of the Game ( 2005 ), by David Block, suggests that the game originated in England ; recently uncovered historical evidence supports this position.

# Before fading in the new track, check that the beats of two tracks match by listening to both channels together in the headphones, as the sound from the speakers can reach you with a delay.

Before the advent of printing, breviaries were written by hand and were often richly decorated with initials and miniature illustrations telling stories in the lives of Christ or the saints, or stories from the Bible.

Before the arrival of Europeans, Banda had an oligarchic form of government led by orang kaya (' rich men ') and the Bandanese had an active and independent role in trade throughout the archipelago.

Before the Norman conquest in 1066, justice was administered primarily by what is today known as the county courts ( the modern " counties " were referred to as " Shires " in pre-Norman times ), presided by the diocesan bishop and the sheriff, exercising both ecclesiastical and civil jurisdiction.