MeasurementsWhenever you are using aromatherapy techniques, it is important to create a blend that works well and smells appealing enough to use. The intensity, strength and quality of essential oils varies greatly. If you are intrigued by aromatherapy and want to learn more about blending therapeutics and formulas, I suggest you read my book Aromatherapy: The Fragrant Art of Healing (Crossing Press, 1995), co-authored with aromatherapist Mindy Green.
A note about drops: The standard number of drops in an ounce is 600, which translates to 100 drops per teaspoon. Unfortunately, though, the size of a drop varies according to the oil being used. Some oils are thicker than others and therefore produce larger drops. Drop size also depends upon the size of the dropper you are using. I've provided a conversion chart of measurements to help you convert formulas in this and other books (see chapter 115). These conversions are also useful when you buy essential oils, which are sold by the milligram, ounce and dram. The conversion from drops to teaspoons is approximate.