1. At Auschwitz clothes infected with lice were treated with crystallised prussic acid . 2. It also can cause prussic acid poisoning in livestock and wildlife. 3. Millet does not contain prussic acid which can be in sorghum. 4. Nevertheless, Holmes receives a bottle of prussic acid from Mrs . Ronder two days later. 5. But though Frost's eyes are as lethal as prussic acid , she's also an incurable romantic. 6. Prussian blue lent its name to prussic acid ( hydrogen cyanide ), which was derived from it. 7. Two months later, on 15 October, Landon was found dead, a bottle of prussic acid in her hand. 8. Fresh growth of grass is sometimes high in prussic acid content and can cause poisoning of grazing livestock. 9. Under the name " prussic acid ", HCN has been used as a killing agent in whaling harpoons. 10. He died in July 1866 while conducting experiments with prussic acid and chloroform as a remedy for tinnitus.