A compilation of work, probably by Harry L. Gilchrist on the use and effects of gas warfare in France during the First World War by the Medical Director of the Chemical Warfare Services in France. It looks at the chemical properties and uses of chlorine, phosgene, chlorpiorin, bromacetone, brombenzylcyanide, chloracetophenone, diphenylchlorarsine, diphenylaminechlorarsine, dichlordiethylsulphide (mustard), chlorvinyldichlorarsine (lewisite), white phosphorus, titanium tetrachloride, sulphur trioxide, ammonium chloride, B.M. smoke mixture, incendiary mixtures, thermit mixtures.

Title from cover page. Title on pg. 1 : Warfare gases. Although noted on the cover page, this cataloguer found no reference in the pages to an author named Church. In binder, 29 cm. Photocopy. This copy is very difficult to read in some places.