=PETROKLASTIT= or =HALOKLASTIT= is a modified gunpowder mixture used in Germany in potash mines and stone quarries. It contains sodium nitrate, sulphur, coal-tar pitch, potassium nitrate, not more than 1 per cent. of potassium bichromate, and may have up to 10 per cent. of charcoal, as, for instance-- Sodium nitrate 69 Potassium nitrate 5 Sulphur 10 Coal-tar pitch 15 Potassium bichromate 1 It is more powerful than ordinary blasting powder, and somewhat less sensitive to blows. This explosive is also made in Switzerland. =PETROLIT= is a German chlorate explosive introduced during the War. It contains not more than 88 per cent. of potassium chlorate, nitro-compounds, kerosene, and neutral salts. (This is rather a dangerous mixture.--A.M.) =PFALZIT.=--A German blasting explosive containing ammonium nitrate, sodium nitrate, not more than 13 per cent. of trinitro-toluene, not more than 1 per cent. of collodion cotton, meal, sodium chloride, etc. =PHŒNIX POWDER.=--A German coal-mine explosive made by Dr. R. Nahnsen and Co., of Hamburg. It passed the Woolwich Test and was on the old Permitted List. Nitroglycerine 29·5 Collodion cotton 0·5 Potassium nitrate 32 Wood meal 38 =PICROL.=--See Shellite. =PIERRITE.=--A form of Cheddite which was made at Gamsee, near Brig, for excavating the Simplon tunnel-- Potassium chlorate 80 Nitro-naphthalene 11·5 Picric acid 2 Castor oil 6·5 =PIT-ITE= was a coal-mine explosive of the Carbonite type, made by the New Explosives Co., Ltd. The composition, which was on the old Permitted List, was-- Nitroglycerine 26 Barium nitrate 33 Wood meal 41 and a little sodium or calcium carbonate. In order to pass the Rotherham Test, the composition was modified to the following, No. 2, which was formerly on the Permitted List-- _Date of Permit_ 1-9-13 Nitroglycerine 24 Potassium nitrate 30 Wood meal 38 Ammonium oxalate 8 Limit charge over 32 oz. Power (swing of ballistic pendulum) 2·15” =PITSEA POWDER NO. 2= was a coal-mine explosive on the Permitted List, made by the British Explosives Syndicate, Ltd.-- _Date of Permit_ 25-11-13 Nitroglycerine 6·5 Ammonium nitrate 55 Potassium nitrate 10 Wood meal 10 Ammonium oxalate 18·5 Limit charge 8 oz. Power (swing of ballistic pendulum) 2·64” The permit has been repealed.