316 MASS. KXPKRIMENT STATION BUIT.ETIN 2i7 



In addition to the work of tiie listed j)r()ject.s of the cranberry station, 

 important investigations were conducted along the following lines: 



1. Weeds. Spraying with a pound of slacked lime to two gallons of 

 water proved to be a valuable new control for green moss. This kills the 

 moss almost completely at a cost of about ten dollars an acre. It should 

 be put on in late October or early November. 



2. The Relationship of Weather to Cranberry Productiveness. The 

 studies so far made show that warm sunny weather is essential to the 

 proper preparation of cranberry vines for maximum productiveness and 

 suggest that other fruit plants such as apple, pear, swamp blueberry, wild 

 black cherry and beach plum are in general affected in the same way. They 

 also indicate that the si/e of general cr;inberry crops can be predicted 

 to a considerable extent. 



3. Varieties. The more noticeable characteristics of practically all the 

 varieties of cranberries grown hnve been studied and compared for the 

 purpose not only of developing and systematizing knowledge of the vari- 

 eties but :\\ho of laying down lines of correlation for guidance in making 

 future selections from the wild. As a result of this work, it has been 

 found that color Of foliage, average seed count, and fruit bloom are cor- 

 related with varietal productiveness and disease resistance. 



A series of analyses made by Prof. F. W, Morse show clearly that the 

 varieties that are in general the most resistant to disease have the highest 

 percentages of total acids in the fruit. 



DEPARTMENT OF DAIRY MANUFACTURES 

 J. H. Frandsen in Charge 



Washing Powders for Dairy Use. (A. W. Phillips'). Work on this 

 l)ro.ject has been completed and the results published as Technical Bulletin 

 13. (See list of Publications). 



The Quinhydrone Electrode in the Dairy Laboratory. (K. E. Wright"). 

 Work on this project up to this time can be summarized as follows: The 

 ■quinhydrone electrode determination of pH cannot be used as a method 

 for determining the keeping quality of milk. Either the quinhydrone 

 method for pH determination cannot be applied to milk, or the pH of milk 

 gives no indication of its keejiing quality. The latter reason seems the 

 more i)r()bable. Further work on this project is imder way. 



A Study of Packaged Ice Cream. (K. E. Vi' right). This study has been 

 confined to the two major objections to the rapid adoption of the fac- 

 tory filled package: namely, the light weight &nd poor texture. It has been 

 found that: 



1. A twelve-ounce pint package made by drawing at an overrun of 

 50 per cent is an ideal weight to meet the objections of the light weight 

 package. 



2. A 12 per cent fat, 10 per cent serum solids, 15 per cent sugar, and 

 35 per cent gelatine product should be drawn at a temperature not over 

 25V'o°F. to avoid eoarse texture. 



3. An increase in fat content of 2 per cent helped to satisfy the re- 

 quirements for food value lacking in the lighter package. Higher fat also 

 appreciably improved the texture. 



' After the resignation of A. W. Phillips, the material was prepared for publication 

 by J. H. Frandsen and M. J. Mack. 



2 Work on this project was started by A. W. Phillips. 



