The object of this investigation was to determine the insecticidal value of various moth-proofing chemical compounds, most of which are now used in some form or another against insects injurious to fabrics. The work was stimulated by the increasing attention given to these insects throughout the world, and by the fact that the application of moth-proofing compounds to infested fabrics is a relatively new commercial process or household practice and is of growing interest not only to textile and furniture manufacturers, but also to the general public.