122 IOWA ACADEMY OF SCIENCES. 



and which crystallized readily at room temperature. This 

 is undoubtedly the best and cheapest method that has yet 

 been used for the preparation of phenyl ether. 



"The preparation, properties, and products of the 

 destructive distillation of aluminum phenolate " are now 

 beinof investigated in company with an advanced student 

 in the chemical laboratory of Morningside College, and will 

 be published as a separate paper at some future date. 



THE SIOUX CITY WATER SUPPLY. II. 



BY ALFRED N. COOK AND W. J. MORGAN. 



It is designed to continue the examination of Sioux City 

 waters each year for a series of years, and thereby collect 

 valuable data which may be of service in the future. It is 

 yet too soon to draw many general conclusions with suffi- 

 cient certainty. It will be observed by comparison with 

 last year's results that the analyses of the city water 

 resulted much better this year. The albuminoids ammonia 

 and nitrates have been very much reduced, and the free 

 ammonia entirely disappeared. 



The analysis of the Missouri river water suffers by com- 

 parison with that of last year, but the specimen was taken 

 near the Floyd monument, which is below the city. The 

 specimen of last year was taken at the combination bridge 

 and was consequently not contaminated with Sioux City 

 sewage. 



The specimen from the Sioux river was taken at the 

 boat landing. Riverside park. 



The results here given are the average of two or more 

 duplicates. The figures indicate parts per million. All 

 analyses were made in May or the first part of June, 1902. 



