Information on the transfer rates of semi-volatile components from tobacco to smoke is of importance to tobacco scientists. However, previous studies in this area have generally focused on experimental nonfilter or king-sized filter cigarettes. There is little information in the literature on other cigarette designs that are used commercially or on analytes other than nicotine and menthol. In the early nineties, scientists at the American Tobacco Company developed a GC method for the determination of glycerol, menthol, and propylene glycol as well as nicotine and five other compounds in the 2-propanol extract generated from the FTC smoke method. In 1993, they applied this methodology to over 160 brand styles taken from the marketplace. The sample set included a wide variety of menthol and nonmenthol products ranging in nominal length from 70 mm to 120 mm and in nominal circumference from 17 mm to 25 mm. In addition, the sample set included products with a range of humectant and menthol levels. Transfer rates have been calculated for glycerol, propylene glycol, nicotine and menthol, where applicable. In particular, it was found that the transfer rates for propylene glycol were more affected by filter ventilation than were those for glycerin. This finding as well as other findings on transfer rates will be discussed in terms of cigarette designs, humectant levels, and product moistures.