Riddle of the Rhine | Page 5

Peace Delegation -Recent Signs of Government Interest-Nitrogen Fixation-The German Nitrogen Syndicate-Haber Process Prominent-The New German Dye Combine -Aggressive Nationalist Policy. 186
CHAPTER X
-LINES OF FUTURE DEVELOPMENT The Element of Speculation-Chemical Tactics and Strategy-New War Chemicals--"Camouflage" Chemicals-Functions Hitherto Immune-Chemical Constitution and Physiological Action-Unsolved Prob-
Contents PAGE lems of Mustard Gas-A New Type of Obstacle-- The "Persistent Lethal" Substance-The Critical Range-The New No-Man's-Land-The "Alert Gas Zone"--Gas and Aircraft-Protective Development -Individual Protection-Collective Protection-Conclusion. 215
CHAPTER XI
-HUMANE OR INHUMANE? Nature of Gas Casualties-Sargent's Picture-Need for Safeguards. 238
CHAPTER XII
-CHEMICAL WARFARE AND DISARMAMENT The Treaty of Versailles-German Information-Limitation of Armament-Report of the Hartley Mission -New Conceptions in Chemical Disarmament-Limitation Mechanical and Chemical-Tank Disarmament -Chemical Limitation-Research-Production-Mechanical and Chemical Preparations for War-Recent Disarmament Proposals-The Covenant of the League Need for Guarantees-Viscount Grey, "Germany must disarm first'~-- Suggested Methods--"Vested Interests"--"Handing Over" Inventions-Neglect of Chemical Disarmament in the Treaty. 242
CONCLUSION-THE TREATY OF THE FUTURE. 264

ILLUSTRATIONS
THE LIVENS PROJECTOR-I. Frontispiece
A completed battery of projectors in the foreground, with a battery on the left rear, half dug in. Suitably camouflaged with brush, the batteries are not observable by aircraft, and, being in "No-Man's-Land," neither party can detect them by day.
FACING PAGE TYPICAL GAS SHELL BURSTING. 30
THE LIVENS PROJECTOR-II 61
A working party fitting electric leads and adjusting bombs prior to discharge. This work occurs at night.
THE LIVENS PROJECTOR-III. 133 Explosion of Livens bombs on the objective.
SMOKE BARRAGE. 181
Note the sharp curtain which is formed, behind which the infantry advance.

INTRODUCTION
No one who has the welfare of the country at heart can fail to share Major Lefebure's anxiety that a clear, accurate, and unbiased account of chemical warfare should be presented to the public, so that the many erroneous ideas now prevalent in regard to poison gas and its uses may be dispelled.
The whole subject of chemical warfare is at present sub judice, and there is great danger that the future safety of this country may be jeopardised by the almost universal ignorance of the peculiarities and potentialities of this class of warfare. Recent publications in the Press have shown a tendency to deal with the subject on purely sentimental grounds, and attempts have been made to declare this form of warfare illegitimate without full and careful consideration of all the facts and their significance for the future.
Major Lefebure has therefore attempted in his book to make it quite clear that no convention, guarantee, or disarmament safeguard will prevent an unscrupulous enemy from employing poison gas, especially if that enemy has discovered some new powerful agent, or possesses, as Germany does in her well-organised and strong chemical industry, a ready means for producing such chemicals in bulk at practically a moment's notice; further, that the safety of this country makes it imperative that the study and investigation of the subject should be continued and that our chemical and dye industry should be developed, so that when an emergency arises we may have the necessary facilities for supply ready to hand.
It is not for me to express any opinion here either as to the desirability of using gas as a weapon or as to the possibility of preventing an enemy from using it. But I am convinced that a decision come to without full knowledge of the facts may involve grave danger and heavy preventable loss of life. I am further convinced that Major Lefebure, by his special knowledge and long experience as chemical liaison officer during the war, is well qualified to speak, and that his opinion is entitled to full consideration. For these reasons I think that his book will do a much needed public service. I wish it every success, and the greatest possible number of readers. HENRY WILSON, F.M.
CHAPTER 1
EXPLANATORY
The Riddle of the Rhine.--The Great War challenged our very existence. But with the tension released, and the Allies victorious, the check to the German menace appears crushing and complete. Few realise that one formidable challenge has not been answered. Silently menacing, the chemical threat remains unrecognised. How, asks the reader, can this be? Are we not aware of the poison gas campaign? Indeed, we have not yet grasped the simple technical facts of the case, and these are merely the outward signs of a deep-rooted menace whose nature, activities, and potentialities are doubly important because so utterly unsuspected by those whom they most threaten.
How many of us, for example, realise that the Germans relied mainly on gas for success in the great March assault of 1918, which threatened to influence the destinies of the world. Yet Ludendorff goes out of his way to tell us how much he counted upon it. How many understand that the 1918 hostilities were no longer a war of explosives. German guns were firing more than fifty per cent. of gas and war chemical. But a deep study of such war facts reveals a much more significant matter.
All are aware of