Origin of bone ash
Examples from the Web for bone ash
Bone-ash varies considerably in price, but of late samples containing 70 per cent of phosphates have sold as low as £4: 10s.Elements of Agricultural Chemistry|Thomas Anderson
The floor of the muffle is protected with a layer of bone-ash, which absorbs any oxide of lead that may be accidentally spilt.
The buttons are removed from the cupel with a pair of pliers and then brushed to remove adherent litharge and bone-ash.
When heated in a closed retort, bones are not converted into bone-ash, but into a body called bone-char.Manures and the principles of manuring|Charles Morton Aikman
The bone-ash is used moistened with a quantity of water, sufficient to make the particles adhere firmly together.A Dictionary of Arts, Manufactures and Mines|Andrew Ure