"As the value of the in checking the depredations of s (whiteants) does not seem to be generally known, I should like to call your readers’ attention to it through your columns. My first knowledge of it came from. sleeping on the ground when camping in a compound which proved to be riddled with termite runs. Several of us used water-proof ground-sheets that we had prepared from unbleached by sprinkling grated paraffin wax over it and then running this into the fibre by passing a very hot iron very slowly over it. In the morning the undersides of these ground-sheets were found to be covered wih termite mud, but to be unharmed and to have served as a complete protection to everything upon them, whereas all campers without them had had their blankets and some even their pyjamas badly eaten, some of the blankets having been reduced to rags. At that time termites were a constant menace to the books in the , where almost all the shelves were built into the walls. In view of the above experience, therefore, I tried coating the insides of all the book-cases with paraffin wax. A great improvement resulted immediately, though termites quickly found their way through any small gaps that had inadvertently been left. This incidentally made these easy to locate and to fill in, since when all trouble from termites has ceased, the danger having been completely and apparently finally averted, for it is now a number of years since the treatment was effected. And the same method has subsequently been used with equal success in s and boxes elsewhere."