Hi all,

This is a bit tangential to archaeology as it deals with the old operating systems of an extant house, but I'm sure there will be many people on this list with the experience and expertise to answer this question:

I'm trying to figure out what a couple of old utility/service connections are in the second-floor bedrooms of a 1911 house in the San Francisco Bay area. 

Pictures here: https://picasaweb.google.com/105553509479038352556/Utilities?authuser=0&authkey=Gv1sRgCK6Nzfby4rTl0QE&feat=directlink

I know I *should*  know what these are, but am drawing a blank - they don't quite look like water/steam heat system pipes as they're narrow diameter and there aren't any other traces of past radiators on the walls or floor. They seem too close to the floor to be connections for gas lighting. 

Anyone recognize these?

Thanks in advance,
Stacy Kozakavich
Oakland, CA