Sometimes the powder is sealed with vacuum in a glass ampoule. By keeping the bottom of the ampoule in liquid nitrogen, and then sealed. The ampoule is then sealed and introduced into an IMC instrument. The sealed ampoule is then put in an oven and given a certain heat treatment. At one of these meal time conversations, Hitler gave Gerda a cyanide ampoule for use. A machine applies colored rings on the ampoule between the two ovens. The ampoule is then placed in a zone oven. However, it is generally possible to start and stop measurements in each ampoule independently. He then uses the water ampoule he was carrying and gets out of Hell.