356 



NINETEENTH REPORT. 



LEGENDS. 



A photograph of the Picea excelsa bed, taken after the completion of 

 the experiment and intended to convey an accurate idea of the method 

 of procedure. The burlap covered portion is that known as I ; the next, 

 covered by the lath, is II; the third is exposed, and is the check plot. 

 This is designated as III. Part IV extends to the stick at the extreme 

 right of the picture. Tlie other species (Pinus strobus and Pinus 

 resinosa) were treated in identically the same manner. 



Plate XVII. 



Plate XVIII. 



Plate XIX. 

 Plate XX. 



Plate XXI. 

 Plate XXII. 

 Plate XXII 1. 



A photograph of the Picea excelsa bed, taken after the comple- 

 tion of the experiment and intended to convey an accurate idea 

 of the method of procedure. 



Fig. 1. Bunches of Pinus strobus grown under the different con- 

 ditions. 

 Fig. 2. Typical individuals of above bunches. 



Taproot development of Pinus strobus. 



Fig. 1. Bunches of Picea excelsa grown under the different con- 

 ditions. 

 Fig. 2. Typical individuals of above bunches. 



Taproot development of Picea excelsa. 



Typical individuals of Pinus resinosa. 



Taproot development of Pinus resinosa. 



