We seem to have two research goals for the long weekend:

1) find out why and when ground limestone was put into masonry cement?

2) what is a steam brick, and describe it?

Any other questions going begging here?

I intend over the weekend to add all the curious souls I met at APT &
IPTW who expressed, often with hesitation, a desire to subscribe to BP.
I may also take it upon myself to conscript some of the more daring
individuals on PL.

We got Gab & Eti T-shirts now. Contact me back channel to order.
--
][<en Follett (I met Christopher Gray once but had Earl Gray Tea, no
cappucino)
SOS Gab & Eti -- http://www.geocities.com/~orgrease
Bullamanka-Pinheads website
http://maelstrom.stjohns.edu/CGI/wa.exe?A0=bullamanka-pinheads