No. 1, February, 1921] UNCLASSIFIED PUBLICATIONS 87 



tion of potassium in natural waters varies inversely as that of P2O5. Lime plays an impor- 

 tant role indirectly in increasing the content of the other three nutrients, by replacing them in 

 chemical reactions and releasing them for use as solutes. The article contains 2 tables giving 

 analyses of waters, both basic and acidic, of inland lakes and tributaries. — J. Roeser. 



560. MacInnes, L. T., and H. H. Randell. Dairy produce factory premises and manu- 

 facturing processes. The application of scientific methods to their examination. Agric. Gaz. 

 New South Wales 31: 5G3-566. 9 fig. 1920.— In this fourth and last installment under this 

 title the authors make an agar plate examination of dairy produce, its containers, and the 

 environment in a modern and finely constructed dairy plant. Results are in striking contrast 

 to those found in other plants in which less attention had been paid to sanitary conditions. 

 In a plant such as this, pasteurization results are not discounted by insanitation. — L. R. 

 Waldron. 



561. MacInnes, L. T., and H. H. Randell. Dairy produce factory premises and manu- 

 facturing processes. The application of scientific methods to their examination. Agric. Gaz. 

 New South Wales 31: 485-489. 7 fig. 1920.— This article gives in some detail the results of 

 bacterial and fungal counts, qualitative and quantitative, of samples taken at different 

 stages of manufacture of dairy products, of their containers, and of the general environment 

 found in one factory. The conclusion to be drawn is that lack of scientific sanitary manage- 

 ment and control is responsible for much financial loss and probable injury to health. — 

 L. R. Waldron. 



562. Rader, F. E. Report of the work at Matanuska station. Rept. Alaska Agric. Exp. 

 Sta. 1917:81-84. 1 pi. 1919.— Reports on preliminary work, including the clearing of the 

 land. — /. P. Anderson. 



563. Saunders, Charles Francis. Useful wild plants of the United States and Canada. 

 £75 p., 16 pi., 7Jt fig. Robert M. McBride & Co. : New York, 1920.— A popular treatise deal- 

 ing with native plants, especially those useful for food, but also considering those that are 

 used for beverages, for soap substitutes, and for medicine, besides mentioning certain poison- 

 ous plants. The book is written in an attractive style, and the information it contains is 

 selected with care. — C. F. Piper. 



564. Stoll, Frank. [Rev. of: Pellett, Frank C. American honey plants. 297 p., 

 155 fig. American Bee Journal, Hamilton, 111. 1920.] Torreya 20:104. 1920.— The book 

 describes as valuable because of nectar or pollen production some 900 species, arranged alpha- 

 betically by common names, with Latin names accompanying the vernacular. The book is 

 timely on account of the present sugar shortage. — J. C. Nelson. 



565. Wallis, T. E. Analytical microscopy. Pharm. Jour. 104:247-249, 349-351, 395- 

 397, 541-542, 578-579; Idem. 105: 159-160, 283-284. 1920. 



