Dating lead came
We've been using H and U shaped pieces of metal for over a thousand years now to hold together all manner of coloured and/or painted glass (and you thought we had advanced over the years? Of course, in our wisdom, we decided to take a metal that's toxic to the human body to do this task. In the past 100 years, while we've widened our horizons somewhat by the addition of zinc, brass and copper cames, it is still the uniqueness of lead and its properties that interests us and is the topic of this paper.MANUFACTURING Lead today is manufactured by extrusion.Leaded lights consist of a framework of H-shaped lead strips, or cames, that join the glass pieces.Except for the smallest, these are supported by metal bars or a framework called a ferramenta (from the Italian for ironmongery), historically made of wrought iron, fixed into the masonry.Medieval cames were cast in moulds with any uneven surfaces shaved away, leaving a distinct, faceted profile.From the 16th century, cames were produced by extruding lead through a mill.
Leaded light windows are found in buildings of many periods and should be carefully repaired, especially if the windows are old.Douglas Kent, technical and research director of the Society for the Protection of Ancient Buildings (SPAB), looks into the care and repair of leaded windows, highlights what can go wrong and how to prevent it Leaded lights make up some of our earliest surviving windows, dating back to medieval times.As glass could only be manufactured in small pieces, the leading allowed for them to be joined together to form a larger window pane. After a few dates with a guy, you feel like this could lead to something, when suddenly he falls off the face of the earth.
Or it’s been months—he’s even uttered the word “girlfriend”—and out of nowhere he says he’s not ready for a relationship.
Jessica Taubert, one of the lead authors of the paper and a researcher at the University of Sydney, advises online daters: “Be mindful that your brain has limited cortical resources.” In other words, slow down!