INDEX. 



317 



Report of cranberry substation for 1915, 

 Director, 

 Treasurer, 

 Resanding cranberry bogs, 

 Revenue, total for year, . 

 Root and scion investigation. 

 Salary increases. 

 Scale, oyster-shell, on cranberry vines. 

 Shade-tree laws of Massachusetts, 1915, . 

 Shade trees: — 



Branching characteristics. 

 Codified shade-tree laws of Massachusetts, 

 Country roadsides, .... 

 Court decisions concerning damages, . 

 Diseases, ..... 



Diagnosis, ..... 



Fungous, ..... 



Slime-flux, . . . 



Treatment of fungous, . 



Wood-destroying fungi, 

 Distance to plant, .... 

 Drought, ..... 



Effects of atmospheric gas on vegetation. 

 Effects of illuminating gas, 

 Effects of light and shade. 

 Electrical injuries, .... 



Alternating currents, effects, . 



Direct currents, general effects. 



Direct currents, cause of death, . » 



Electrolysis, 



From arc lamps, . 



From wires. 



Lightning, . 



Earth discharges. 

 Susceptibility to lightning stroke, 

 Excavations, curbings and sidewalks. 

 Fertilizing, 



Guards, .... 

 Injurious chemical substances. 



Banding substances, 



Coal tar. 



Creosote, 



Gas oil, 



Kerosene oil, 



Miscible oils, 



Other injurious substances. 



Paint, .... 



Road oil, 



Salt 



Mechanical injuries, 



Bleeding, 



Earth fillings around trees. 

 Rapidity of growth. 

 Requirements, 



Adaptability to climatic conditions, 



1915, 



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