It was slate. No it's dust. At least where you whacked it.



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From: The listserv where the buildings do the talking <[log in to unmask]>

To: [log in to unmask] <[log in to unmask]>

Sent: Thu Jun 21 14:43:29 2012

Subject: [BP] strange mortar detailing ...







You (all) recall my original query about a 1920 apartment house at 245 West 75th Street, with "one of the nicest details I've ever seen: at every fifth course, the masons laid the mortar with a continuous strip of copper right in the middle of the bed."



First, I should have noted that it is every fifth bed >>for the first two floors only<< which further supports my surmise that it is decorative, not functional.



Second, I took a hammer with me today, because I wondered if it might  be lead, instead of oxidized copper.  It's not.  It's slate, very thin flats of slate.



Christopher



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