When larger Jewish transports were sent to Auschwitz concentration camp in the first half of , the Nazis began using - in addition to the first operational gas chamber - two provisional gas chambers set up in farmhouses whose owners had been evicted from the village of Brzezinka. The operational use of the gas chambers in Auschwitz was preceded by experiments intended to find the most effective chemical agent and to work out the proper method for its use. About Soviet POWs and sick Poles were killed in such experimentation from September , Afterwards, the morgue at crematorium I in the main camp . Feb 28, · The sprawling camp consisted of three parts, Auschwitz I, the base camp, Auschwitz II - Birkenau (the extermination camp) and Auschwitz III - Monowitz (the labour camp). All were considered concentration camps, and there were 48 sub tsinjoarivo.info: Rebecca Flood.