Green Cross (chemical warfare) The mixture was chlorine-phosgene, with 95% and 5%. Green Cross (chemical warfare) Green Cross (Grünkreuz) is a World War I chemical warfare pulmonary agent consisting of chloropicrin (PS, Aquinite, Klop), phosgene (CG, Collongite) and/or trichloromethyl chloroformate (Surpalite, Perstoff). Green Cross is also a generic World War I German marking for artillery shells with pulmonary agents (chemical payload affecting the lungs). The tip of the projectile with the fuse end painted green and a green cross at the bottom of the cartridge. Other Green Cross mixtures were based on phosgene and/or diphosgene. The first use of Green Cross was on May
Westward the Course of Empire Takes Its Way imperial iconography and is regarded as a symbol of American exceptionalism and the realization of Manifest Destiny, ultimately leading to the evolution of the American Empire. The painting takes its inspiration from the closing lines of George Berkeley's "Verses on the Prospect of Planting Arts and Learning in America: <poem> Westward the course of empire takes its way; The first four Acts already past, A fifth shall close the Drama with the day; Time's noblest offspring is the last. </poem> The imagery of the pilgrim gesturing on a high rock is very similar to the 5 cent postage stamp, "Fremont