TABLE OF ANALYSIS OF VAEIOUS SAMPLES FROM THE DARK
LINES IN THE ANTONINE WALL.
By Mr. George Paterson, of the Borax Works, Liverpool.
These samples were examined for vegetable matter in May and June, 1891.
The samples were, after careful drying, incinerated in a platinum dish, and
the loss in weight taken as vegetable or organic matter. The following is a
table of results so obtained :—
Section from Percentage
■which sample Part where taken. of vegetable Character of ash.
Croy No. 2. Third layer of vallum 16-00 Brown red.
,, Layer in centre 37'00 Dirty brown.
No. S. Layer in centre of vallum 11'20 Red.
No. 10. Very black bottom layer of 25-92 Red. Not so dark
vallum as in No. 8.
,, Third layer, with marly or 4'88 Light brown.
No. 11. Bottom layer of vallum 13'70 Brown, earthy -
of wood in this
,, Deep black thin layer of vallum 20'22 Light brown.
Seabeg No. 1. Thin dark line on bottom of 8-26 Light brown,
,, Brown red line, 10 inches from 8'20 Dark brown,
,, Black and reddish-brown line, 14 5'GO Red brown.
inches from bottom
,, Reddish line, 4 inches up 5'60 Light brown.
No. 2. Thin blackish line, 8 inches up 5 '40 Light brown.
from base of vallum
,, Thin black line, 13 inches up 5'10
,, Thin dark line, 24 inches up 4'50 Red brown.
,, Thick black, near ground level 5'90 Light brown.
,, Red line in vallum 3'90
Bonnyside No. 1. Black line on bottom of vallum 16 '30 Light brown.
,, Fifth layer up 20'45 Light brown.
,, Tenth layer up 13*07 Light brown.
,, Black patch on dark line through 15'80 Very light brown.
,, Reddish part of that line 3'49 Very light brown.