252 Annual Report for 1906 of the Consulting Chemist. 
A 
B 
C 
Oxide of iron and 
alumina 
2*98 
1*49 
Oxide of iron and alumina . 
7*93 
Lime 
77*14 
86*54 
Lime . 
43*37 
Magnesia, carbonic 
acid, &c. . 
6*86 
7*58 
Carbonic acid, &c. 
29*59 
Insoluble siliceous 
matter 
13*02 
4*39 
Insoluble siliceous matter . 
19*11 
100*00 
100*00 
100*00 
“A” was inferior in quality and decidedly lumpy, not 
being at all what “ ground 55 lime should be. “ B,” though 
better in quality, was still distinctly coarse as regards grinding. 
Both samples came from the York district. 
“ C ” was a sample of “lime ashes,” obtained in Hampshire, 
and, though costing only 3s. 8d. per ton, could not be worth 
carting any distance, seeing the large amount of extraneous 
matter it contained. 
8. Flue Dust. 
A sample of this, taken from the flues of boilers at a 
colliery, was sent me and analysed as follows : — 
Loss on heating ..... 4*34 
Oxide of iron and alumina. . . . 41*16 
Lime ........ 13*54 
Siliceous matter ..... 35*21 
Carbonic acid, alkalies, &c. . . . 5*75 
100 00 
Nitrogen ....... none 
This, it will be noticed, has a small quantity of lime in 
it, but any value it might have is discounted by the presence 
of a large amount of sulphur compounds injurious to vege- 
tation. 
9. Lime Waste from Boiler Water. 
The precipitated mass formed in softening boiler water 
with lime has, as the chief objection to its employment in 
agriculture, the difficulty of getting it in dry and portable 
form. In one case referred to me, however, the lime waste 
had been subsequently pressed in hydraulic presses and so 
dried, being obtained in portable form, easy of application 
to the land. It gave the following analysis : — 
Water of combination, &c. . . . 13*21 
Carbonate of lime . . . . . 74*50 
Magnesia ....... 8*61 
Silica ....... 3*68 
100*00 
