respirators, despite frequent exhortations to do so, many no doubt who acted out of bravado or were merely careless knew that their respirators were available at home, to be carried once gas had been used. MODIFICATION OF ORIGINAL PROPOSALS 5. In one material respect the position has changed since I proposed at the end of August (in C.P.(45)121) gradually to collect some 45 - 50 million respirators then in the hands of the public and store such of them as on examination were found to be serviceable.