Another incident that happened to one of my nurses this past week made more very vivid impressions. I say “incident” because that is all it was in the life of the camp, but the young woman said it was the most interesting day she ever spent. She, Miss Cuppaidge, had been detailed to go with a doctor, an anæsthetist, and an orderly to a “Casualty Clearing Station.” When called for, small groups like this are sent up from the base hospital whenever there is a big drive. I received an order that Miss Cuppaidge was to go for her “gas training” at a certain time. The group is just got ready and kept at their regular jobs until an order comes for them to proceed to the “C. C. S.” At the appointed time for the training Miss Cuppaidge went to the “gas school” in the neighboring training camp. There she and four others, nurses from other hospitals, were taken in charge by an officer. They first had minute instructions about properly adjusting their gas masks. These are rather complicated, as they are regular respirators. A piece through which they breathe has to be held in the mouth, and a pair of padded clamps shut off the nose. This is inside the mask which fits around the face and is held on by straps around the head. They must learn to put on the things and fix the clamps and mouth pieces in six seconds. They then have to learn how to breathe just through the mouth without choking or what is worse, Miss Cuppaidge said, without dribbling. They also have to get used to the queer sensation in the ears when they swallow. When the masks are all right and everybody is breathing all right, they are put into a gas-filled room. This gas is just a tear gas. They are left there five minutes, then taken out and they are asked about irritated eyes. If there is irritation the masks are leaking or improperly adjusted. They are then taken into trenches where other gases are liberated to get them used to the odors, so that they can detect the presence of gas quickly. Some gases are so deadly three breaths of it will cause death, hence the hurry in quick detection and quick adjustment of masks. Some of these gases travel six and seven miles. As near as I could make out the gases are mainly of two sorts, a chlorine gas and a “phosgene” one. The officer lectured to the nurses upon the effects of these gases and about the treatment of them and in the middle of the afternoon sent them home smelling like the dickens, but, as Miss C. said, entirely unafraid of gas and quite prepared to guard against it if they meet it. Their gas outfits they have hitched to them all the time when near the place they are likely to meet it. We shall have other small groups go up to the C. C. S. after this one is called out and I mean to be detailed to go with one. These parties stay sometimes only a few days and sometimes a few weeks, but I certainly mean to go if I can persuade the authorities to let me leave Miss Taylor in charge. I have so little contact with the