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The inspectors would require to be numerous and as closely in touch with the plants and processes as the actual factory staffs. Consider the Leverkusen works for a moment. They cover a very wide range of products, are admirably planned on a well thought out and rational scheme, and there is a reason for the position of every unit.

The thiodiglycol was forwarded to two other factories, one of which was Leverkusen, where 300 tons of mustard gas were produced monthly. The reaction between thiodiglycol and hydrochloric acid was one which required very considerable care. At one stage of the war the Allies viewed with much misgiving the possibility of having to adopt this method.

The fact that the thing was conceived and executed during the stress of war throws an interesting sidelight on German character." Incidentally, it also throws a further sidelight upon the part played by Leverkusen in the chemical warfare campaign. German Attitude towards Inspection.

When we remember, however, that at Leverkusen alone there was a staff of 1500 technical and commercial specialists, apart from thousands of workpeople, before the war, and that the latter were increased by 1500 during the war, we find it difficult to place a limit on the services which might have been rendered by this research centre alone.

The importance of protection was realised very early, and a gas school for officers of all armies was organised at Leverkusen for training in protection. We cannot but regard it as significant that Leverkusen is also the site of the enormous Bayer organic chemical works which played such a large part in poison gas production. The school dealt mainly with protection. My War Memories, page 338.

This is particularly so as we know that large numbers of respirator-drums had been made in this factory, and that a gas school existed at Leverkusen in 1915.

At Leverkusen the existing plant can produce at least thirty tons a month, and we learn "the plant remains intact ready for use." At Ludwigshafen the capacity was considerably higher, amounting to 600 tons per month. As production was commenced before the war, there were no difficulties in developing the process, expansion alone being necessary. Xylyl Bromide.

This was produced in considerable quantity before the war at Leverkusen and Ludwigshafen, leading to many exceedingly important dyes, amongst the most commonly used at present being the brilliant acid fast cotton scarlets so largely used in England. More expansion of plant was necessitated.

A member of another Allied mission was informed by one of the staff at Leverkusen that the authorities there were well aware of the difficulties in chemical warfare, apart from production, for they had some experience in the designing and testing of chemical shell.

The final stage, the preparation of diphenylchlorarsine, the actual Blue Cross shell constituent, occurred at Hochst, which also carried out the first three stages, already outlined as occurring at Ludwigshafen and Leverkusen. The last stage was a simple one and was carried out in plant and buildings previously used for peace purposes.