Annual  Report  for  1909  of  the  Consulting  Chemist.  349 
4.  Soot. 
Samples  sold  under  this  name  are,  as  I have  pointed  out 
before,  of  very  variable  origin  and  quality.  One  such  sent 
me  was  the  following  ; — 
Moisture  ........  33’ 17 
’ Organic  matter  and  salts  of  ammonia  . . 44'95 
Oxide  of  iron,  &c.  ......  10'89 
Siliceous  matter  ......  10'99 
100-00 
^ Containing  nitrogen  .....  1-02 
Equal  to  ammonia  ......  1-24 
This  material  cost  26s.  &d.  per  ton,  a figure  greatly  in 
excess  of  its  value. 
5.  Lime. 
Attention  has,  and  very  rightly,  been  much  directed  to  the 
use  of  lime,  and  to  the  value  of  which  the  Woburn  Experi- 
ments so  amply  testify.  It  would  seem  that  the  attention 
of  traders  also  is  being  more  directed  to  the  production  of 
good  samples  both  of  ordinary  and  of  ground  lime.  Still, 
much  variation  exists  among  these,  as  the  following  analyses 
show  : — 
A 
B 
C 
Lime  . ...  . 
. 91-92 
66-57 
91-00 
Oxide  of  iron  and  alumina 
1-13 
6-37 
2-29 
Carbonic  acid,  magnesia,  &c. 
3-56 
6-23 
2-27 
Insoluble  siliceous  matter. 
3-39 
20-83 
4-44 
100-00 
100-00 
100-00 
“ A ” and  “ C ” were  excellent  samples.  The  latter  came 
from  Sussex,  and  cost  18s.  per  ton  delivered.  “ B ” was  much 
inferior,  but  still  cost  16s.  per  ton  delivered,  in  Shropshire. 
The  following  is  an  analysis  of  lime  ashes  ; these  cost 
only  2s.  ll(i.  per  ton  delivered,  and,  though  of  low  quality, 
must  be  considered  worth  getting. 
Moisture,  loss  on  heating,  &c.  ....  49-43 
Lime 29-62 
Oxide  of  iron,  alumina,  carbonic  acid,  &c.  . . 14-27 
Insoluble  siliceous  matter  .....  6-68 
100-00 
