Agriculture Reference
In-Depth Information
Table 6
Samples of analysed rubbing bricks.
Sample
Date
Provenance
Details
1
1682
Gate pier Chiswick Park, England
Mortared in place
2
1950
Thomas Lawrence & Sons, Bracknell, England
Known as 'TLBs'. Never used. Kept dry
3
1856
Arch Weaver's House, New
Known as 'Malm Cutter' from Malm clay
Wanstead, England
of London stock bricks. Mortared in place
4
C17th
Unknown church, The Netherlands
Mortared in place
5
c.
1500
Outside Brugge, Belgium
Mortared in place
6
1999
Traditional brickyard, England
Washed clay (London bed). Never used
7
1999
Traditional brickyard, England
Pan ground. Not washed (London bed
clay). Never used
8
1999
Traditional brickyard, England
Washed clay. Never used
9
1999
Traditional brickyard, England
Carving quality rubber. Never used
10
1999
Traditional brickyard, England
Never used
Table 7
Mineralogical composition of the rubbing bricks.
Quartz
Feldspar
Calcite
Filosilicates
Diopside
Wollastonite
Haematite
Goethite
1
XXXX
XXX
(X)
X
T
X
X
2
XXXX
XX
X
X
3
XXXX
XXX
(X)
XX
X
4
XXXX
XX
X
(X)
X
(X)
5
XXX
XX
X
X
6
XXXX
XX
X
7
XXXX
XX
(X)
X
XX
8
XXXX
XXX
X
X
9
XXXX
XXX
X
X
X
X
10
XXXX
XXX
X
X
X
X
Key XXXX predominant; XXX abundant; XX significant; X present; (X) scarce; T traces
(samples 3, 4 and 5); and those that are haematite-rich (samples 2, 6, 7, 8, 9
and 10). Sample 1 could belong to either of these groups, although only trace
amounts of diopside were observed.
