and this may be taken as the usual composition of the explosive, but the nitroglycerine is sometimes gelatinised with collodion cotton.
DONARIT A contains up to 16 per cent. of aluminium powder and no nitroglycerine.
DONARIT V, which has been introduced recently, contains up to 10 per cent. of potassium perchlorate, and is practically the same as [Astralit V].
Wetter-Donarit contains also sodium chloride or other cooling agent.
Gelatine-Donarit contains up to 20 per cent. of dinitro-chlorhydrin gelatinised with collodion cotton, in addition to the constituents of [Donarit], and may also contain sodium nitrate.
DORFIT is a German coal-mine explosive made by the firm of Allendorf—
| I. | II. | Gesteins. | |
| Ammonium nitrate | 65 | 61 | 66 |
| Potassium nitrate | 5 | 5 | 5 |
| Trinitro-toluene | 6 | 15 | 15 |
| Flour | 4 | 4 | 4 |
| Sodium chloride | 20 | 15 | 10 |
ALDORFIT is a simpler mixture intended for use where there is no danger of fire-damp—
| Ammonium nitrate | 81 |
| Trinitro-toluene | 17 |
| Flour | 2 |
It is authorised in Great Britain.