Michael Edison

Michael Edison is a chemical engineer and President of Edison Coatings, Inc. in Plainville, CT. For the past 40 years he has worked in product and process development and technical services, focused primarily on restoration materials for historic masonry, stone and concrete. He is a Director of the APT Northeast Chapter, a Past President of …

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Jack Healy

As Principal at Ryan-Biggs Associates in Clifton Park, NY, Jack Healy is responsible for structural engineering design and management of historic preservation and masonry repair projects. He is Past-President of the Capital District Chapter of the NYS Society of Professional Engineers and in 2005, was named Outstanding Professional Engineering Manager of the Year by the …

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John Harry

John Harry has been a restoration consultant on the maintenance and preservation of the exterior envelopes of historic and older buildings for the last 23 years. Previously, he owned a company for 15 years which performed historic restorations. He has been involved in the restoration of over 500 structures ranging from log cabins to large …

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Cynthia Field

Dr. Field earned her doctorate with a thesis titled “Daniel Hudson Burnham’s City Planning; An Examination of the Development of City Beautiful Planning.” (1974) Most recently she has been co-editor and author of a chapter of The National Mall: Rethinking Washington’s Monumental Core (2008) and published an essay on “The McMillan Commission’s Trip to Europe” …

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Leya Edison

Leya Edison is Vice President and General Manager of Edison Coatings, Inc. in Plainville, Connecticut. She served as Conference Moderator, and was one of the primary organizers of the First and Second American Natural Cement Conferences. She authored a paper entitled “Perspectives: The Reintroduction of Natural Cement”, published by the Journal of ASTM International in …

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SPHC is a venue for education and advocacy concerning the wide range of distinct cementitious materials used historically in the United States and around the world. These cements are not only an important record of the technology and materials available at a particular time and place, but are components of a building system whose performance …

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The Society for the Preservation of Historic Cements, Inc. is dedicated to education, research, documentation, and training in the history and use of historic cements, and advocates preservation of significant examples of the materials and their application. The Society for the Preservation of Historic Cements, Inc. (SPHC) is a non-profit, 501(c) 3 organization.