To-day, the ability for aviation to carry increasing weight furnishes a new method for abundantly spreading poison gases with the aid of stronger and stronger bombs, and to reach armies, the centres of population in the rear, or to render regions uninhabitable.
Chemical warfare is therefore in a condition to produce more formidable results over more extended areas.
It is incontestable on the other hand that this growth will find an easy realisation in one country, Germany, addicted in times of peace, to wholesale manufacture of chemical products, which a simple modification in reactions can transform into war products.
This country, deprived, partially at least, of its former methods of fighting, and its numerous forces of specially trained soldiers, regularly organised and strongly armed, will be more drawn toward the new systems of attack— that of chemical warfare.
Chemical warfare must therefore enter into our future provisions and preparations, if we do not wish to experience some terrible surprises.
The work of Major Lefebure gives an exact idea of the possibilities he finds to-day in Germany, and through them the dangers with which she threatens us. In this form it constitutes a warning; and information of the highest order, for the minds who remain anxious for the fate of their country confronted by the inefficience of the old fighting methods which the progress of industry out of date renders daily.
By sounding the alarm in both our countries, I find myself in company with my faithful friend Field Marshal Sir Henry Wilson. This is an old habit, contracted by both of us, many years ago, which we still maintain at the present time to insure for ourselves once again, peace in the future.
Together, we say, read this work of Major Lefebure. F. FOCH.
CONTENTS PAGE CHAPTER I-EXPLANATORY The Riddle of the Rhine-A Critical Point in Disarmament-Need for a Balanced View of Chemical Warfare-Some Preliminary Explanation—"Poison Gas" a Misleading Term-The French Physiological Classification-Asphyxiating Substances-Toxic Substances-Lachrymators-Vesicant or Blistering Compounds-Sneezing or Sternutatory Substances-The Tactical Classification-Persistent Substances-Non-persistent Substances-Penetrants-Special Gas Weapons and Appliances-Gas Shell. 17