§ 112. As Great Britain had introduced bullets manufactured at the Indian arsenal of Dum-Dum, near Calcutta, the hard jacket of which did not quite cover the core and which therefore easily expanded and flattened in the human body, the First Hague Peace Conference adopted a declaration signed on July 29, 1899, by fifteen Powers--namely, Belgium, Denmark, Spain, Mexico, France, Greece, Montenegro, Holland, Persia, Roumania, Russia, Siam, Sweden-Norway, Turkey, and Bulgaria--stipulating that the contracting Powers should abstain, in case of war between two or more of them, from the use of bullets which expand or flatten easily in the human body, such as bullets with hard envelopes which do not entirely cover the core or are pierced with incisions. Austria-Hungary, China, Germany, Italy, Nicaragua, Portugal, Japan, Luxemburg, Servia, Switzerland, and Great Britain acceded later. [Sidenote: Projectiles diffusing Asphyxiating or Deleterious Gases.] § 113. The First Hague Peace Conference also adopted a Declaration, signed on July 29, 1899, by sixteen States--namely, Belgium, Denmark, Spain, Mexico, France, Greece, Montenegro, Holland, Persia, Portugal, Roumania, Russia, Siam, Sweden-Norway, Turkey and Bulgaria--stipulating that the signatory Powers should in a war between two or more of them abstain from the use of projectiles the sole object of which is the diffusion of asphyxiating or deleterious gases. Austria-Hungary, China, Germany, Italy, Japan, Luxemburg, Nicaragua, Servia, Switzerland, and Great Britain acceded later. [Sidenote: Violence directed from Air-Vessels.]