36 EXPERDIEXT STATION. [Jan. 



been made of this disease. For five years experiments have been 

 carried on relative to the control of potato scab, and some of 

 the results of this work will be contained in this report. These 

 experiments will be continued. 



Some further lines of work are given in brief: — 



Investigations relating to improved methods of seed germina- 

 tion and separation. 



Experiments on the control of weeds in lawns, etc. 



Investigations relating to the injurious effects of oil sprays 

 on fruit trees. 



Investigations relating to the effects on shade trees of chem- 

 ical substances applied to roadbeds. 



Investigations relating to the effects of different fumigants 

 on greenhouse crops which are subject to variations in light in- 

 tensity and moisture. 



Investigations relating to the effects of various spraying solu- 

 tions on plants exposed to variations in light intensity, etc. 



Investigations relating to the burning of the foliage of green- 

 house plants by fumigants as related to the condition of the 

 stomata. 



A study of the weed situation in cranberry bogs. 



Testing of a large variety of chemical substances to ascertain 

 their fungicidal value. 



Investigations relating to overfeeding and malnutrition in 

 greenhouse plants, a trouble which is becoming more common 

 in greenhouses. 



Investigations relating to the relationship between various 

 light intensities and the effects of different spraying solutions, 

 and the maximum carbon assimilation in such crops as potatoes, 

 grapes, etc. 



Investigations relating to the fixation of nitrogen by the elec- 

 trical stimulation of micro-organisms. 



Experiments with methods of keeping roots from drain tiles, 

 — a continuation of those already published. 



A study of spraying machinery and new types of nozzles. 



Experiments with a new type of soil sterilizer. 



Investigations relating to the mosaic disease as occurring on 

 different plants ; nearly completed. 



