In one case where a horse and a mule in the same supply column were fitted with their masks at the same time the difference was most marked. The horse was dressed up without much trouble, though he did not like it. He whinnied and sneezed, breathed hard and perspired and looked rather pitiable, but stuck it out. The mule, on the other hand, had to be roped to get the mask on at all. Then he danced about, heels in the air and head down, and tried to rub off the objectionable appendage against the rope, and then against a tree. This did not effect its removal, and for a minute the cunning animal stood still with his ears cocked at different angles. Then suddenly he put his head to the ground and before anything could be done to prevent it put his foot on the respirator, pulled his head up smartly and left the respirator under his hoof. These masks have proved of the greatest value and have saved any number of horses’ lives. The cavalry are not provided with them, as it is not anticipated that they will be near enough to be affected by gas-cloud attacks, and when the cavalry are mounted and in action it is unlikely that they will meet even poison-gas shells in large numbers. Added to this is the fact that a horse can stand more gas than a man without being distressed. The casualties in the June attack were lower than in any one previously. Indeed, it was a satisfactory feature of the whole gas business that despite the increasing deadliness of the German clouds the losses they caused became less and less. Of course the proportion of severe cases in those gassed became greater, for with such strong clouds it had become a case of hit or miss. Either a man was protected completely or he was caught out badly; and this spoke well for the protection supplied, for otherwise there would have been a much bigger proportion of light cases. Of the minor effects of these boche gas clouds, that on vegetation is the most marked and gives a good idea of the strength of the gas. For miles in the track of the cloud all green stuff is burned up or wilted. Grass is turned yellow, the leaves of trees go brown and fall off, and the garden crops are entirely destroyed. I have seen root crops in the fields and garden crops of onions, beans and lettuce quite destroyed. But curiously enough, farther back, in places where this still happens to the garden crops, the cereals and the hedges seem to escape serious injury.