white lead
white lead heavy, white substance, poisonous, insoluble in water, extensively used as a white pigment and base in paints. It is one of the oldest paint pigments used by humans. Chemically, it is basic lead carbonate, a mixture of lead carbonate and lead hydroxide. It is prepared in various ways. When used in paints, it is first ground into a fine powder and mixed with linseed oil. Its covering power is greater than that of most other white pigments, but its use has certain disadvantages. It reacts with hydrogen sulfide and some other sulfur compounds in the atmosphere, the lead combining with the sulfur to form lead sulfide, a dark substance. In paints made with white lead a chalky film is formed after some time. White lead is extremely poisonous, and painters who apply it are often afflicted with painter's colic (see lead poisoning ) because of the absorption of too great a quantity into the body. White lead is used also in making putty and in the manufacture of certain pottery. Sublimed white lead is the basic sulfate of lead mixed with lead oxide and zinc oxide; it is also used as a white pigment. White lead is often adulterated with barite.
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The Hagia Sophia.(CULTURE)
Magazine article from: World and I; 9/1/2007; ; 700+ words
; The Hagia Sophia: Evidence of Istanbuls Conflicted Past...this struggle more apparent than in the Hagia Sophia--the "Church of Holy Wisdom...1500 years. Constantinople and the Hagia Sophia: Early History Istanbul was only named...
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Hagia Sophia, 1850-1950: Holy Wisdom Modern Monument
Magazine article from: The Catholic Historical Review; 4/1/2007; ; 700+ words
; Hagia Sophia, 1850-1950: Holy Wisdom Modern Monument...This fascinating investigation of Hagia Sophia in Istanbul amasses a wealth of documentation...was crucial for the transformation of Hagia Sophia as an artifact of the past-first as...
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Hundreds of Greek icons stored in Istanbul's Hagia Sophia damaged due to neglect, official says
News Wire article from: AP Worldstream; 9/24/2003; ; 528 words
; ...Greek icons that were stored in the Hagia Sophia _ once the central shrine of Greek...The icons were brought to the Hagia Sophia from throughout Turkey for storage...pictures of the storage room at the Hagia Sophia, which showed icons that were...
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Hagia Sophia
Magazine article from: The Architects' Journal; 8/26/2004; ; 387 words
; Hagia Sophia By W Eugene Kleinbauer et al. Scala...8.02). This new paperback on the Hagia Sophia, Istanbul - the great Byzantine church...history, materials and decoration of Hagia Sophia, with due attention to its audacious...
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Advanced Byzantine cement based composites resisting earthquake stresses: the crushed brick/lime mortars of Justinian's Hagia Sophia.
Magazine article from: Construction and Building Materials; 12/1/2002; ; 700+ words
; ...determine the earthquake worthiness of Hagia Sophia in Istanbul have proved that the...determine the earthquake worthiness of Hagia Sophia in Istanbul have shown that the...concrete structures. The mortars of Hagia Sophia display considerable mechanical...
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Art and Identity in Thirteenth-Century Byzantium: Hagia Sophia and the Empire of Trebizond.(Book review)
Magazine article from: Church History; 3/1/2008; ; 700+ words
; ...Thirteenth-Century Byzantium: Hagia Sophia and the Empire of Trebizond. By...the churches of St. Eugenios and Hagia Sophia. Focusing on the best preserved, the church of Hagia Sophia, and also considering fragmentary...
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Correcting Hagia Sophia Misconception
Newspaper article from: Intelligencer Journal Lancaster, PA; 4/23/2008; 325 words
; ...visited the Church of Holy Wisdom (Hagia Sophia) in Istanbul, Turkey, the list...misinformation. The Mosque of St. Sophia, listed as number five, was actually...mosque. Additionally, the Greek word Sophia means wisdom; the church was dedicated...
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Mending the breach: with the title "Poetic Justice," the latest Istanbul Biennial signaled its interest in reconciling self-expression and politics. For the first time, the exhibition sites included the Byzantine splendor of the Hagia Sophia.
Magazine article from: Art in America; 12/1/2003; ; 700+ words
; ...the art below; the Yerebatan Cistern, a dark, lamp-lit, sixth-century Roman structure that served as a palace reservoir during the Byzantine era; and, for the first time, the Hagia Sophia, the souring sixth century basilica, w
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Between east and west. (The Fourth International Istanbul Biennial, Antrepo, Hagia Irene and Yerebatan, Istanbul, Turkey)
Magazine article from: Art in America; 5/1/1996; ; 700+ words
; ...two-story customs warehouse by the Bosphorus; the Hagia Irene, a Byzantine basilica dating from the 4th century...historic old city. The Yerebatan Cistern is near the Hagia Sophia, and the Hagia Irene is in the first courtyard of the Topkapi Palace...
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The wisdom of God: Sophia and Christian theology. (Cover Story)
Magazine article from: The Christian Century; 10/19/1994; ; 700+ words
; ...Current disputes over the place of Sophia in Christian prayer and worship take...and sometimes contentious history. Sophia has remained an important image for...capital to Christ as the Holy Wisdom (Hagia Sophia) of God, and the Emperor Justinian...
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Hagia Sophia
Book article from: The Columbia Encyclopedia, Sixth Edition
Hagia Sophia [Gr.,=Holy Wisdom] or Santa Sophia...converted into a museum. Architecture Hagia Sophia is the supreme masterpiece of Byzantine...vaults and domes pile up impressively. Hagia Sophia served as model for several of the great...
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Hagia Sofia
Book article from: The Concise Oxford Dictionary of World Religions
Hagia Sofia, Aya Sofya , or Sancta Sophia (‘Divine Wisdom’) The mosque, originally basilica or church of the Divine Wisdom, in Istanbul. It was...
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Sophia
Book article from: The Oxford Dictionary of Phrase and Fable
Sophia female name. St Sophia was the legendary mother of three virgin martyrs, Faith, Hope...Church, and can be understood as an allegory of Divine Wisdom ( Hagia Sophia , see also St Sophia at saint ) from whom proceed the virtues of...
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St Sophia
Book article from: The Concise Oxford Dictionary of the Christian Church
St Sophia. See HAGIA SOPHIA .
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Santa Sophia
Book article from: The Concise Oxford Dictionary of the Christian Church
Santa Sophia. See HAGIA SOPHIA.
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