follows: " regulated so as to distill 30 cc in about 10 minutes, the dis- 

 tillate passing through a small filter paper." 



In the sixth line, after " dilute acid," insert the following: " added 

 in such a manner as to wash down the particles adhering to the sides 

 of the flask." 



In the seventh line, after " filter paper," insert the following: "or 

 until the distillate amounts to 360 cc." 



In the eighth line change the words "free from diresorcol" to "puri- 

 fied if necessary." 



Page 26, to the paragraph entitled "Qualitative test of the purity of 

 phloroglucol," add the method of Fraps for purifying phloroglucol, as 

 follows : 



About 300 cc of hydrochloric acid, 1.06 sp. gr., are heated in a beaker and 11 grams com- 

 mercial phloroglucol added in small quantities at a time, stirring constantly until it has 

 almost entirely dissolved. Some impurities may resist solution, but it is unnecessary to 

 dissolve them. The hot solution is poured into a sufficient quantity of the same hydro- 

 chloric acid (cold) to make the volume 1 ,500 cc. It is allowed to stand at least over night- 

 better several days to allow the diresorcol to crystallize out and filtered immediately 

 before using. The solution may turn yellow, but this does not interfere with its usefulness. 

 In using it the volume containing the required amount is added to the distillate from the 

 pentosan. 



Page 26, " (f) Method for estimating galactan," in line fourteen, 

 after "ammonia," add: "The filter paper and contents are then 

 washed several times with hot water by decantation, the washings 

 being passed through a filter paper, to which the material is finally 

 transferred and thoroughly washed." 



Eighteenth Convention, 1901, Bui. 67. 



Page 25, " (d) Diastase method for starch," fifth line, instead of 

 "from 20 to 40 cc" read "20 cc", digest for a definite length of time 

 and without examining with the microscope boil again (microscopic 

 examination to be made later). Sentence as corrected reads as fol- 

 lows: . 



* * * add 20 cc of malt extract and maintain at this temperature for an hour. Heat 

 again to boiling for a few minutes, cool to 55 C., add 20 cc of malt extract, and maintain at 

 this temperature until a microscopic examination of the residue with iodin reveals no starch. 



Line 10, instead of "nearly neutralize while hot with sodium car- 

 bonate", read "cool, and neutralize with sodium hydrate or nearly 

 neutralize with sodium carbonate ". a 



Preparation of malt extract, first line, for "overnight" read "two 

 or three hours." 



Under " (e) Provisional method for the determination of pentosans 

 by means of phloroglucin," instead of "Three grams of the material 

 are placed in a flask," read " A quantity of the material, chosen so that 



alt appears that this should have been reported as follows: "cool and nearly neutralize 

 with sodium hydrate." 



