oil per ounce of cedar leaf oil then the combination is applied to a surface like any standard paint other low odor carriers in addition to mineral oil could also be used as a carrier these solvents must be non reactive with thujone oil and evaporate at room temperature or lower they also must not leave an odorous residue which would overpower the odor of thujone oil i have conducted several experiments to show the effectiveness of my rat and mice repellents the first experiment consisted of three boxes with the entrances to each blocked with sheets of screen the rats were placed in the middle box the box on the left contained food and the walls of the box were stained with the rat and mice repellent this repellent was a mixture of 12 thujone oil and 88 lacquer the box on the right contained only food and the walls were not stained at the end of five days the metal screens were lifted the rats would not enter the box with the rat and mice repellent but ate from the box that contained no repellent i have also applied my liquid repellent to underfloor areas of homes that i identified as rodent nests or pathways a few days later i returned and saw no signs of rats or mice the owners of the homes i treated also reported no signs of rodents after treatment in a second.