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

CHAPTER II-THE GERMAN SURPRISE The First Cloud Gas Attack-The Element
of Surprise -Lord Kitchener's Protest-German Preparations--
Research-Production-Field Preparations-German Opinion of
Results-Germany Prompted by Production Monopoly-Standard Uses
for Gas-Gas Shell-Further German Cloud Attacks-Hill 60-Origin of
German Gas Shell-Early German Gas Shell-A Successful Experiment-Lachrymators
at Loos, 1915-The Flammenwerfer-German Phosgene Clouds-Gas and
the Eastern Theatre-Conclusion. 31

CHAPTER III-THE ALLIED REACTION The Need of Retaliation-First Signs-The
Loos Attack, September, 1915-The Somme Battle, 1916--Reasons for
British Cloud Gas Success-Our Casualties-Exhausting Preparations