Part 12

Ammonium nitrate 80 Trinitro-toluene 12 Rye flour 4 Nitroglycerine 4 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.

=PERDORFIT= contains not more than 52 per cent. of potassium perchlorate, sodium and ammonium nitrates, not more than 29 per cent. of trinitro-toluene and vegetable meal or gums.

=DRAGONITE.=--A coal-mine explosive made by Curtis’s and Harvey, formerly on the Permitted List--

Nitroglycerine 35·5 Nitrocotton 2·5 Potassium nitrate 44·5 Vaseline 5·5 Wood meal and charcoal 12

=DREADNOUGHT POWDER.=--A coal-mine explosive made by Roburite and Ammonal, Ltd., for a time on the Permitted List--

Date of Permit 1-9-13

Ammonium nitrate 75·4 Trinitro-toluene 4 Ammonium chloride 5 Sodium chloride 15·5 Red oil 0·1

Limit charge 32 oz. Power (swing of ballistic pendulum) 2·05”

There is also Quarry Dreadnought Powder, which is not a permitted explosive.

=DUNNITE.=--A high explosive used by the United States for filling shell. It is stated to give dangerous compounds with iron, so apparently is a compound of picric acid.

=DU PONT PERMISSIBLE.=--An American coal-mine explosive. The following is on the British Permitted List--

No. 1. Date of Permit 26-4-16

Nitroglycerine 9·5 Ammonium nitrate 67·5 Wood pulp 8 Sodium chloride 15

Limit charge 18 oz. Power (swing of ballistic pendulum) 2·82”

=*DU PONT SMOKELESS POWDER.=--An American shot-gun powder of the fibrous 36-grain bulk type--

Soluble nitro-cellulose 95·8 Metallic nitrates 2·2 Moisture 2·0

=DUXITE.=--A coal-mine explosive made by the Westphalia Anhalt Explosives Co. It passed the Rotherham Test, and was for a time on the British Permitted List--

Nitroglycerine 32 Nitrocotton 1 Sodium nitrate 28 Wood meal 10 Ammonium oxalate 29