This mixture is unable to detonate without the use of a blasting cap. The mine can be detonated by any mechanism that activates the blasting cap. The main magazine is , and the blasting cap storage building is about . Tellurium has been used in delay mixtures and in blasting cap initiator compositions. Urea nitrate explosions may be initiated using a blasting cap. A fuse was wound around the inner tube, connected to a blasting cap. In 1846, a Federal blasting cap factory was built along the Worblen. Nobel invented a detonator in 1863, and in 1865 designed the blasting cap. Lingg committed suicide in his cell with a blasting cap, smuggled inside a cigar. He used a blasting cap smuggled to him by a fellow prisoner. It is a relatively stable (secondary) high explosive compound, requiring a blasting cap to detonate. Typical products are generally shock-insensitive secondary explosives, requiring a blasting cap or other detonator. A blasting cap exploded in Orchard's pocket when he was back in his room.