254  Annual  Report  for  1904  of  the  Consulting  Chemist. 
obtainable,  it  has  been  found  that  the  islands,  if  left  undisturbed, 
are  soon  occupied  again  by  the  sea  birds,  and  fresh  deposits  are 
formed  which  accumulate  sufficiently  by  the  end  of  twelve  or 
fourteen  years  to  enable  them  to  be  worked  again,  rich  supplies 
being  then  obtainable.  Such  are  the  following  : — 
A ' 
B 
Moisture  .... 
19-92 
20-98 
'Organic  matter  . 
44-53 
44-32 
Phosphate  of  lime 
21-77 
21-83 
’Alkalies,  &c. 
10-84 
9-89 
Insoluble  siliceous  matter  . 
2-94 
2-98 
100-00 
100-00 
'Containing  nitrogen 
12-01 
12-35 
Equal  to  ammonia . 
15-31 
14-99 
’Containing  phosphoric 
acid  .... 
3-16 
2-99 
Ecjual  to  phosphate  of 
lime  .... 
6-89 
6-53 
Total  phosphate  of  lime 
28-66 
28-36 
These  were  both  very  high-class  Peruvian  guanos,  and 
would  command  a ready  sale.  They  cost  12/.  15s.  per  ton  on 
rail  in  London,  and  were  well  worth  the  money. 
3.  2Ieat  Manure. 
A delivery  sold  in  Kent  under  this  name,  at  50s.  per  ton, 
was  supposed  to  contain  7 per  cent,  of  ammonia.  The 
analysis  of  a sample  of  it  submitted  to  me  showed  it  to  contain 
only  about  one-third  of  this  amount,  and  the  material  was  wet, 
and  worth  nothing  like  the  price  asked.  The  analysis  was  : — 
Moisture  ......  44‘50 
'Organic  matter  .....  ,30'53 
Phospliate  of  lime  ....  2'47 
Ciirbonate  of  lime,  &c.  . . . 10’7(5 
Sand 11-74 
100-00 
'Containing  nitrogen  . . . 2‘03 
E<iual  to  ammonia  ....  2-40 
4.  Toivn  Refuse. 
This  class  of  material  is,  of  course,  of  very  variable  nature, 
and  the  uncertainties  of  giving  a fair  value  to  it  are  much 
increased  by  the  difficulty  attending  the  obtaining  of  a 
representative  sample  where  old  tins,  boots,  pieces  of  china, 
glass,  &c.,  often  form  a considerable  part  of  a delivery. 
However,  I had  occasion  to  get  a large  and  fairly  representative 
