STANDARD THERMOMETER--The thermometer is graduated at zero and in tenth degrees from 10deg. C. to 65deg. C., with one auxiliary reservoir at the upper end and another between the zero mark and the 10deg. mark. The cavity in the capillary tube between the zero mark and the 10deg. mark is at least 1 cm. below the 10deg. mark, the 10deg. mark is about 3 or 4 cm. above the bulb, the length of the thermometer being about 37 cm. over all. The thermometer has been annealed for 75 hrs. at 450deg. C. and the bulb is of Jena normal 16''' glass, or its equivalent, moderately thin, so that the thermometer will be quick-acting. The bulb is about 3 cm. long and 6 mm. in diameter. The stem of the thermometer is 6 mm. in diameter and made of the best thermometer tubing, with scale etched on the stem, the graduation is clear-cut and distinct, but quite fine. The thermometer must be certified by the U. S. Bureau of Standards. GLYCEROL CAUSTIC SOLUTION--Dissolve 250 g. potassium hydroxide in 1900 cc. dynamite glycerin with the aid of heat. DETERMINATION--Heat 75 cc. of the glycerol-caustic solution to 150deg. C. and add 50 g. of the melted fat. Stir the mixture well and continue heating until the melt is homogeneous, at no time allowing the temperature to exceed 150deg. C. Allow to cool somewhat and carefully add 50 cc. 30 per cent sulfuric acid. Now add hot water and heat until the fatty acids separate out perfectly clear. Draw off the acid water and wash the fatty acids with hot water until free from mineral acid, then filter and heat to 130deg. C. as rapidly as possible while stirring. Transfer the fatty acids, when cooled somewhat, to a 1-in. by 4-in. titer tube, placed in a 16-oz. salt-mouth bottle of clear glass, fitted with a cork that is perforated so as to hold the tube rigidly when in position. Suspend the titer thermometer so that it can be used as a stirrer and stir the fatty acids slowly (about 100 revolutions per minute) until the mercury remains stationary for 30 seconds. Allow the thermometer to hang quietly with the bulb in the center of the tube and report the highest point to which the mercury rises as the titer of the fatty acids. The titer should be made at about 20deg. C. for all fats having a titer above 30deg. C. and at 10deg. C. below the titer for all other fats. Any convenient means may be used for obtaining a temperature of 10deg. below the titer of the various fats. The committee recommends first of all a chill room for this purpose; second, an artificially chilled small chamber with glass window; third, immersion of the salt-mouth bottle in water or other liquid of the desired temperature. UNSAPONIFIABLE MATTER. EXTRACTION CYLINDER--The cylinder shall be glass-stoppered, graduated at 40 cc., 80 cc. and 130 cc., and of the following dimensions: diameter about 1-3/8 in., height about 12 in.