14 EXPERIMENT STATION. [Jan. 



17. Color vision in boos. 



A number of these linos of investigation arc well advanced, 

 though none can be regarded as brought to completion. Suffi- 

 cient progress has, however, been made in connection with a 

 ]iniiil)or of them to warrant publication, and technical papers 

 covering some phases of this work will bo found in later i)agos. 

 The more important are as follows : — 



The natural fertility of cranberry bogs. 



Tobacco injury due to malnutrition or overfertilization. 



Variation, correlation and herodity in garden ])Oi\s. 



The effect of fertilizer on variation in corn and beans. 



The chemistry of arsenical insecticides. 



CRAJfBERRY SUBSTATIOI^. 



Dr. II. J. Franklin remains in local charge of the business 

 and investigational work connected with our cranberry sub- 

 station, lie has devoted himself to the matters in his charge 

 with the greatest faithfulness and enthusiasm, and it is a pleas- 

 ure to testify to the great value of his services. 



During the past year our equipment for work in the interests 

 of cranberry growers at the substation in East Warehani has 

 been much increased and a largo amount of construction work 

 has been done. The princi])al im])rovomont made has been the 

 erection of a building. This l)uil(ling contains a large screening 

 and packing room, living and office rooms for the local officer in 

 charge, a small laboratory, and large basement and cellar stor- 

 age rooms. The cost of the building was about $2,000. 



Dr. Franklin furnishes the following description of special 

 construction at the station bog completed during the year: — 



1. Flooding Areas. — Five separate areas were diked off on 

 the station bog for experiments in flooding. Four of the areas 

 contain about one-fifteenth of an acre each and the fifth con- 

 tains about an eighth of an acre. Those areas are all sojiaratod 

 from each other by dikes and narrow check strips. The dikes 

 were built of turf and sand in the usual way, and average about 

 20 inches in lieight and 3 foot in width. In all, about 1,100 

 running foot of this diking was built. A canal, about 450 foot 

 long and 3 feet wide, was constructed around the margin of the 



