Imperial College of Science.—During the early period the Imperial College of Science rendered great services by assisting in research. It continued to do so during the rest of the war, but was later associated with a large number of British university chemical and scientific departments in pursuing a huge programme of chemical warfare research. We can only make passing reference to the development of the training and experimental grounds which formed such an important part in assisting decisions on chemical warfare policy. The Porton ground, however, was a model of its kind, a pioneer amongst Allied experimental grounds, and a tribute to the creative and administrative efforts of Lt.-Colonel Crossley, C.M.G., C.B.E., who was its commandant from its inception to the end of the war.

The Chemical Warfare Department.—The growing importance of chemical warfare, the vigorous chemical initiative assumed by Germany in the summer of 1917, and various other reasons led to reorganisation of the Chemical Warfare services in this country in October, 1917, and the Chemical Warfare Department, under Major-General Thullier, formerly Director of Gas Services, B.E.F., was constituted. This reorganisation witnessed a great increase in research and other activities of the department and a still greater mobilisation of the chemists of the country. Although this change witnessed further centralisation by the incorporation of the Anti-Gas Department, thereby settling once and for all the inherent association between offensive and defensive research, a fact which had been apparent to many long before, yet it still ignored the fundamental connection between offensive research and supply. This had been recognised in French organisation as early as 1915, yet we did not reach the ideal solution even at the end of the war.

The Anti-Gas Department.—We have mentioned the origin of the Anti-Gas Department. Although separate in organisation from chemical warfare research, yet the remarkable work and personality of the late Lt.-Colonel E. F. Harrison, C.M.G., overcame the disadvantages by energetic liaison and a great capacity for the internal organisation. General Hartley has paid a tribute which we cannot refrain from repeating: "Colonel Harrison was one of the great discoveries of the war. It is often stated that he was the inventor of the box respirator, but this he would have been the first to deny. His great merit was as an organiser. He gathered round him an enthusiastic group of young chemists and physicists, and the box respirator represents the joint result of their researches, carried out under his inspiration and controlled by his admirable practicable judgment. He organised the manufacture of the respirator on a large scale, and it is a great testimony to his foresight and energy that in spite of all the difficulties of production, the supplies promised to France never failed. Fifty million respirators were produced by the department, and of these nineteen million were box respirators."

Anti-gas research was at first centred in the R.A.M. College, Millbank, and from the beginning of 1917 in the Physiological Institute, University College, London. The work done in research and production not only protected the whole of the British Army, but formed the backbone of American and a large part of Italian protection. Further, the sacrifices made in connection with this work are not sufficiently known. Numbers of young scientists sacrificed their health and sometimes life, in carrying out the critical tests upon which the safety of millions of Englishmen and Allies depended.

Designs Committee.—We cannot leave this branch of the subject without referring to the Chemical Warfare Designs Committee. An important trend in chemical warfare was its growing independence of the normal weapons of war, and its special requirements when adapted for use with both the normal and newer types. This tendency found expression in the above Committee under the direction of Professor Jocelyn Field Thorpe. The development of satisfactory chemical shell was an enormous problem, and the importance of entirely new forms of the chemical weapon will be brought out in dealing with the limitation of armaments.

French Organisation.—French development followed very similar lines.

From April 28th, 1915, a Commission of military representatives and scientists was organised under General Curmer. This gave place in June to a Chemical Warfare Research Committee under M. Weiss, Directeur des Mines au Ministere des Traveaux Publics. In August, 1915, three special Committees were formed; one under M. Kling for problems from the front, whose organisation was responsible for a volume of exceedingly reliable identifications of enemy chemicals of great use to the Allies; another under M. Moureu for offensive research, whose brilliant organic investigation characterised later French developments, and the other under M. Vincent, for research on protection. But, in the meantime, the importance of gas shell was impressed upon the French and, on the 1st July, 1915, this organisation passed into M. Albert Thomas's new Ministere de L'Artillerie et des Munitions. Manufacture passed into the hands of the Directeur du Materiel Chimique de Guerre. In September, 1915, these sections were centralised under General Ozil, attached to the same Ministry. General Ozil's service was strongly supported by a number of eminent French scientists, and achieved unusual success in the face of great practical difficulties.

A very close liaison was maintained with the army, and the initiative, energy, and devotion of all concerned cannot be too highly praised. In production alone the difficulties were enormous. There was no highly organised dye industry available. The prewar German monopoly had seen to that. Elaborate organisations and continuous research work under difficult conditions were necessary to replace the smooth, running normal activities of the great German dye combine. The salient points in French production are dealt with more fully in another chapter.

In research and protection French activities were no less handicapped and just as creditable. The protection of the French armies was largely achieved through the genius and tireless industry of Professor Paul Lebeau.

Quick to realise the need of retaliation against the new German weapon, the French developed their chemical offensive and defensive with characteristic elan and intuition. Contributing largely to Allied research, they took the lead in Inter-Allied co-operation and liaison, and their activities in this field were due to much worthier causes than mere geographical position.