=HASSIA-CHLORAT= is an explosive that was introduced in Germany during the War. It consists of 65 per cent. potassium chlorate and 35 per cent. combustible, and it is claimed that the large proportion of the latter not only makes it a mild explosive, but also renders it comparatively insensitive. It is also called Spreng-chlorat. =HAYLITE.=--A coal-mine explosive made by the National Explosives Co. There were three varieties on the Permitted List: No. 1 was also on the old Permitted List, but has now been repealed. No. 1. No. 2. No. 3. _Date of Permit_ 1-9-13 21-11-16 30-5-18 Nitroglycerine 26 15·5 9·5 Collodion cotton 1 0·3 -- Ammonium nitrate -- -- 60·5 Potassium nitrate 20 -- -- Sodium nitrate -- 59·5 -- Barium nitrate 20 -- -- Trinitro-toluene -- 5 -- Mineral jelly 7 -- -- Wood meal 15 7·7 5·5 Sodium chloride -- -- 19·5 Ammonium oxalate 11 -- 5 Borax -- 12 -- Limit charge 10 18 16 oz. Power (swing of ballistic pendulum) 2·18 1·96 2·44” =H.E.= stands for High Explosive, used for charging shell or other military purpose. =*HEBLER POWDER= was a so-called smokeless powder which was manufactured at one time in Switzerland. According to an analysis published by Cundill and Thomson, it was ordinary gunpowder in which about a fifth of the saltpetre had been replaced by ammonium nitrate. It did not appear to have a greater tendency to absorb moisture than ordinary powder. It was also called Wellite. See also Ammonpulver. =HECLA NO. 2= is an American coal-mine explosive on the Permissible List. It is an ammonium nitrate explosive made by the Du Pont Co. =HECLA POWDER= is a brand of American dynamite. =HELAGON= is a German perchlorate explosive made by the Köln-Rottweil Pulverfabriken. It contains not more than 10 per cent. of potassium perchlorate, not more than 5 per cent. of zinc-aluminium alloy, aromatic nitro-bodies and neutral nitrates, excepting those of potassium and barium. It may also contain flour or potato meal and neutral substances. =HELIT= is a similar explosive to Helagon, except that it contains dinitro-chlorhydrin, not more than 6 per cent., in the place of the zinc-aluminium alloy. =HELLHOFITE=} =HELLITE=} are different names for what is practically the same explosive of the Sprengel type. It consists of a mixture of strong nitric acid and various nitro-compounds, _e.g._-- Dinitro-benzene 1 Nitro-benzene 1 Nitric acid 1·5 Nitric acid 2·5 A form of this explosive was tried by Gruson as a charge for shell many years ago. See also Panclastite.