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"This book presents a state of the art in mortar characterisation, experimentation with and applications of new mortars for conservation and repair of historic buildings. This volume includes the following topics: characterisation of historic mortars (methods, interpretation, application of results), development of new materials for conservation (compatibility, durability, mix designs), the history of mortar technology and fundamental experimental studies of material properties. The papers have been selected from those presented at the 3rd Historic Mortars Conference, held in Glasgow, Scotland, September 11-14th 2013. All the papers here underwent a two stage peer review process, for the conference and again for this volume. In some cases this has resulted in a revision and updating of content."

"window glass is an essential component of most buildings but the transparancy of much glaass means it often goes unnoticed. modern window glass is almost invisible but historic glass usually has a tint or colour and variation in surface texture and thickness, all of which distort a transmitted (and reflected) image. this distortion contributes to the overall aesthetic quality of a historic building. it is important that any architectural conservation decisions, such as the retention and/or replacement of window glass, proceed from a possition of knowledge. The most important aspect of extant glazing is wheather or not it is original. this paper explores the use of a chemical analysis technique to determine the age of historic glass. "

"The conclusion briefly evaluates some of the key accomplishments of the recent historic preservation movement. It also provides a synthesis that draws on the lessons of each of the chapters, sketching out some of the hurdles that remain and are likely to occupy the agendas of preservationists in the decades ahead. The development of the historic preservation movement is, in itself, evidence of our particular American culture, as it changes. All of the evidencestrongly suggests, however, that this social campaign will continue and our legacy will extend to future generations."