=M.B. POWDER= (Modernised Black) is a black powder mixture in which part of the potassium nitrate has been replaced by potassium or ammonium perchlorate, generally the potassium salt. It is manufactured at Bonnybridge, Stirling, at the works originally erected for making Mitchellite. During manufacture the composition is heated in steam boilers. (See “Arms and Explosives,” 1911, p. 7.) =M.D.= See =CORDITE=. =MEGANIT= is a Hungarian nitroglycerine explosive similar to American dynamite, except that it contains a small percentage of nitrated vegetable ivory. =MELANITE.=--A Belgian blasting explosive consisting of-- Nitroglycerine 78 Collodion cotton 4 Sodium nitrate 18 It contains, therefore, a considerable excess of oxygen. =MÉLINITE= is a high explosive used by the French for filling shell and other military purposes. It consists essentially of picric acid, to which other substances are sometimes added. Paraffin wax has been added to diminish the sensitiveness. Mélinite D is simply picric acid, but Mélinite O contains also a little Crésilite 2 (q. v.). =MELLING POWDER= was a coal-mine explosive on the Permitted List, made by the Cotton Powder Co. The permit has been repealed. _Date of Permit_ 1-9-13 Nitroglycerine 5 Ammonium nitrate 53·5 Sodium nitrate 12 Trinitro-toluene 6 Wood meal 4·5 Ammonium oxalate 19 Limit charge 12 oz. Power (swing of ballistic pendulum) 2·62” =MERCURIT= is a blasting explosive that has been introduced recently in Germany. It consists of 88 per cent. of potassium chlorate and 12 per cent. of high boiling neutral tar oil. In Mercurit II. up to 20 per cent. of the chlorate may be replaced by perchlorate. =MERSEY POWDER= was a coal-mine explosive on the Permitted List, made by the Cotton Powder Co. The permit has been repealed. _Date of Permit_ 3-7-15 Nitroglycerine 5·5 Ammonium nitrate 51 Sodium nitrate 11 Trinitro-toluene 6 Wood meal 3·5 Ammonium chloride 23 Limit charge 18 oz. Power (swing of ballistic pendulum) 2·60” =METEOR AXXO= is an American coal-mine explosive on the Permissible List. It is a low-grade dynamite containing a hydrated salt. =MIEDZIANKIT= (also called Egelit or Kieselbacher Chloratsprengstoff) is a German chlorate explosive of the Sprengel class. It consists of porous potassium chlorate impregnated with not more than 10 per cent. of kerosene, having a flash point not below 30° C. It has met with some unfavourable reports, as it is found that results are not uniform unless the impregnation be carried out in special factories, the original idea having been that it was to be done shortly before use. During the War a modification of the explosive was introduced for use in coal mines. This contains up to 30 per cent. of sodium chloride.