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to an analysis published by Cundill and Thomson, it was ordinary gunpowder in which about a fifth of the saltpetre had been replaced by ammonium nitrate.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].
*HENRITE is a smokeless shot-gun powder of the fibrous 33-grain bulk type. A sample examined in 1902 had the composition—