cal conjuring, without, however, an adequate return of solid
instruction that you can carry usefully with you into every-day life and
practice.

TABLE B.[3]

-------------------------------------------------------------------------------
DYEING POWERS OF COLOURS FROM 1 TON OF LANCASHIRE COAL.
------------+------------+------------+-------------+-------------+------------
0.623 lb. of|1.34 lb. of |9.5 lb. of |7.11 lb. of |1.2 lb. of |2.25 lb. of
Magenta will|Methyl |Naphthol |Vermilline |Aurin will |Alizarin
dye 500 |Violet will |Yellow will |will dye 2560|dye 120 |(20%) will
yards of |dye 1000 |dye 3800 |yards of |yards of |dye 255
flannel, 27 |yards of |yards of |flannel, 27 |flannel, 27 |yards of
inches wide,|flannel, 27 |flannel, 27 |inches wide, |inches wide, |Printers'
a full |inches wide,|inches wide,|a full |a full |cloth a full
shade. |a full |a full |scarlet. |orange. |Turkey red.
|violet. |yellow. | | |
------------+------------+------------+-------------+-------------+------------

TABLE C.[3]
-------------------------------------------------------------------------------
DYEING POWERS OF COLOURS FROM 1 LB. OF LANCASHIRE COAL.
------------+------------+------------+-------------+-------------+------------
Methyl | Naphthol Vermilline | Aurin | Alizarin
Magenta or Violet. | Yellow. or Scarlet. | (Orange). |(Turkey Red)
------------+------------+------------+-------------+-------------+------------
8 x 27 |24 x 27 |61 x 27 |41 x 27 |1.93 x 27 |4 x 27
inches of |inches of |inches of |inches of |inches of |inches of
flannel. |flannel. |flannel. |flannel. |flannel. |Printers'
| | | | |cloth.
------------+------------+------------+-------------+-------------+------------

[Footnote 3: These tables were compiled by Mr. Ivan Levinstein, of
Manchester.]

Before we go another step, I must ask and answer, therefore, a few
questions. Can we not get some little insight into the structure and
general mode of developing the leading coal-tar colours which serve as
types of whole series? I will try what can be done with the little
knowledge of chemistry we have so far accumulated. In our earlier
lectures we have learnt that wat