Re "Rockefeller Center Seeks City Approval for Flashier Facades" (news article, May 2): Rockefeller Center is primarily a composition of masses, some of which are as large as neighboring skyscrapers.
As the waste glass, glass bottle for soft drinks (soda-lime silicate glass) was used having a composition of Na2O (15.5 mass%), CaO (11.0 mass%) and SiO2 (73.5 mass%).
Moreover, most buildings viewed from the outside are compositions of masses.
His buildings, which are almost all of concrete, are subtle compositions of masses and planes that play against light and, often, against natural elements such as water and plantings.
Michael Shara, curator of astrophysics at the American Museum of Natural History in Manhattan, said astronomers could study the Mira tail to map the composition of the mass it has shed over time.
A diary from the years 1812-18, preceding the composition of the mass, contains Vedic sentiments such as "Free from all passion and desire, that is the Mighty One".
The rate and composition of the mass export is affected by natural and anthropogenic events; however, the recent industrialization of corn-based agriculture has dramatically increased the sediment, nitrogen, and phosphorus loads measured in Midwestern rivers.
(Haydn would later compose a cantata on this subject for Emma Hamilton: the Lines from the Battle of the Nile). Thus, although the nickname "Nelson" does not originate with the composition of the mass, it could date from September of 1800, when Admiral Nelson and his party visited Prince Esterházy and Haydn in Eisenstadt.
The location and composition of a mass is critical to narrowing the differential diagnosis.
