218 Amniul Report for 1907 of the Consulting Chemist. 
Percentage of : — 
A 
B 
C 
Nitrogen 
4-38 
4-97 
4-13 
Equal to ammonia 
5-32 
6-04 
5-02 
Mineral matter 
. 25-85 
24-29 
21-81 
containing Sand 
. 14-60 
8-78 
13-15 
' (). Native Guano. 
This material, prepared from sewage, has been found to 
vary considerably in i-egard to the amount of moisture which 
it contains. If properly dried and sent out carefully, it will 
contain only about 17 per cent, of moisture, but I have 
examined a number of samples and found the degree of damp- 
ness to vary. When the material is not properly dried not 
only is its value to the purchaser materially affected, but the 
mass is very subject to ferment and to heat considerably. The 
following comparative analyses of two samples submitted to 
me will illustrate this difference : — 
A 
B 
Moisture ...... 
17-67 
30-71 
’Organic matter ..... 
47-39 
38-33 
Lime ....... 
3-13 
2-65 
^Phosphoric acid ..... 
1-67 
0-91 
Oxide of iron, alkalies, carbonic acid, &c. 
11-24 
8-60 
Sand ....... 
18-90 
18-80 
100-00 
100-00 
’Containing nitrogen .... 
1-97 
1-74 
Equal to ammonia .... 
2-39 
2-11 
’Equal to phosphate of lime . 
3-65 
1-99 
These analyses show a difference of 18 per cent, of moistm'e 
in the two samples, while the phosphates are much reduced in 
sample “ B.” 
7. Lime Screenings. 
One is rightly suspicious, as a rule, about purchasing waste 
lime, lime screenings, and the like, especially when no 
guarantee is given. It happens occasionally, however, that 
such can be obtained cheaply, as illustrated in the following 
analysis : — 
per cent. 
Lime (caustic) ....... 52'39 
Siliceous matter ...... 12‘75 
The cost of this was only 3s. 4d. per ton delivered, and it must 
be considered well worth getting. 
C. Miscellaneous Materi4.ls. 
X Lead in Cider. 
A member of the Society sent me for examination a sample 
of Cider drawn from a cask, saying that several of his men 
complained of illness after drinking the Cider. On testing the 
