32 a EXPERIMENT STATION. [Jan. 



ments on dry bogs indicate that resanding is not an effective 

 method, and the suggestion is made that in case of very heavy 

 infestation the destruction of all the bloom by spraying with a 

 solution of iron sulfate will be an effective means of starving 

 out this insect in a bog so treated. 



Experiments on weed destruction by spraying with iron 

 sulfate indicate that a 20 per cent, solution is fairly effective 

 in killing the tops of horsetail (Equisetum), but the roots 

 were not killed ; and Dr. Franklin is not ready to recommend 

 repeated use of such a solution, as it is possible that in large 

 amounts it will prove injurious to the cranberry itself. 



Copper sulfate dissolved at the rate of 1 pound to 25 gallons 

 of water injected into holes in the bogs proves ineffective. 



Careful observations upon the fruit produced by plots re- 

 spectively untreated and resanded indicated that resanding 

 injures keeping quality. 



Professor ]\Iorse's work in the study of the water from cran- 

 berry bogs indicates that the composition of this water was not 

 affected to an appreciable extent by the varying fertilizer treat- 

 ment of the different bogs. His observations further indicate 

 that vine growth is affected in greater degree by varying drain- 

 age conditions than by variation in fertilizer applied. The 

 greatest vine growth was obtained in the bogs through which 

 the water moved with greatest freedom. 



INVESTIGATION. 



In the agricultural department of the experiment station the 

 • lines of experimental work pursued have been similar to those 

 followed for the last few years, but supplemented more and 

 more fully by correlated chemical studies. In this work the 

 usual number of field and closed plots has been employed. The 

 number of pot experiments has been less than usual, owing to 

 the absence of the director during the early part of the year. 

 Attention will be here called to a few only of the results which 

 seem most fully established. 



High-grade sulfate of potash combined with bone meal con- 

 tinues to show itself superior to muriate in the same combina- 



