II. III. IV. V. VI. Ammonium nitrate -- 84 87 60 85 Sodium nitrate 70 -- -- -- -- Ammonium nitro-cresol sulphonate -- 16 -- -- -- Sodium cresol sulphonate 30 -- 13 10 -- Cellulose residue -- -- -- -- 15 Sodium sulphate -- -- -- 30 -- No. II. is the only one made at present. =R.D.B.= (Research Department B). See =CORDITE=. =RED CROSS= explosives are American dynamites containing some nitro-toluene or other substance to make the nitroglycerine low-freezing. =RED H=, Nos. 1 to 7 are American coal-mine explosives on the Permissible List. They are ammonium nitrate mixtures. =*RED STAR= is a 33-grain bulk smokeless powder for shot-guns, introduced in 1906 by the New Explosives Co. According to an analysis given in “Arms and Explosives,” 1917, p. 76, its composition is-- Nitrocellulose, insoluble 52·2 ” soluble 25·5 Metallic nitrates 10·5 Nitro-compounds 7·0 Vaseline 3·0 Moisture 1·8 =RENDROCK.=--A brand of American dynamite. =REX POWDER= is a coal-mine explosive made by the Cotton Powder Co. It is on the Permitted List, and is used to a considerable extent-- _Date of Permit_ 16-8-15 Nitroglycerine 12 Ammonium nitrate 60 Wood meal 8·5 Sodium chloride 19·5 Limit charge 20 oz. Power (swing of ballistic pendulum) 2·61” =REXITE.=--A coal-mine explosive made by the New Explosives Co., which was on the old Permitted List. It is no longer “permitted.” Nitroglycerine 7·5 Ammonium nitrate 66 Sodium nitrate 14·5 Trinitro-toluene 7·5 Wood meal 4·5 =REXOL.=--A high explosive containing ammonium perchlorate, zinc dust, resin and mineral oil. =R.F.G.= (Rifled Fine Grain)} black powders made for =R.L.G.= (Rifled Large Grain)} rifles and rifled ordnance respectively. =RHENANIT.=--A German blasting explosive containing ammonium nitrate, not more than 4 per cent. of blasting gelatine, and combustibles such as charcoal and naphthalene. Wetter-Rhenanit is for use in coal mines, and contains also sodium chloride. Rhenanit V., which has been introduced recently, contains up to 10 per cent. of potassium perchlorate, and is similar to Astralit V. =RHEXIT.=--An Austrian dynamite. II. III. IV. V. Nitroglycerine 50 35 24 15 Sodium nitrate 32·6 37 56·2 62·9 Wood meal 17 27·5 19 21·2 Sodium carbonate 0·4 0·5 0·8 0·9