Calcium oxide15 is known as lime1116 and is one of the top 10 chemicals1217 produced annually by thermal decomposition of limestone. The thermal decomposition of calcium carbonate to lime18 is one of the oldest chemical reactions known. For several thousand years, lime has been used in mortar (a paste of lime, sand and water) to cement stones to one another in buildings, walls and roads. The setting of mortar involves several chemical reactions.
World Synagogues: Table of Contents | Australia | Canada. Click Left/Right to Scroll, Click the Caption to View the Individual Image. Ahavath Beth Israel Synagogue in Boise, Idaho. This is the oldest Synagogue building still in use West of the Mississippi River. Touro Synagogue - Newport, Rhode Island. Kahal Kadosh Beth Elohim Synagogue - Charleston, SC.
One of Syracuse's oldest churches closes on Easter. Ellen M. Blalock/The Post-Standard This is the pipe organ at the back of First Presbyterian Church United, 620 W. Genesee St., Syracuse. The church will close on Easter, April 8. The organ is for sale. One of Syracuseâs oldest church congregations â it formed in 1824 â is closing . First Presbyterian Church United, at 620 W. Genesee St., holds its last service on Easter, April 8. Shutting down brings a new, smaller congregation to life, one devoted to serving First Presbyterianâs Near West Side neighborhood.