FLOW OF SAP. 



267 



TABLE 



Showing 1 the date and amount of the Flow of Sap from species which 

 bleed somewhat freely, with dimensions of specimens under observation. 



Total amount of Sap collected from the following species during the 

 season of 1874. 



Acer saccharinum, from Dec. 16, 1873, to Apr. 30, 1874, 

 A. saccharinum, (30 feet from ground) from April 1, 

 to May 1, 



A. Pennsylvanicum, from Mar. 23, to May 4, 

 Betula alba var. populifolia, from Mar. 23, to May 23 



B. lenta, from Mar. 29, to May 29, 

 B. lutea, from Apr. 3, to May 27, . 

 B. papyracea, from Mar. 29, to May 26, 

 Carpinus Americana, from Apr. 9, to May 22, 

 Juglans cinerea, from Mar. 23, to May 18, . 

 Ostrya Virginica, from Apr. 16, to May 26, . 

 Vitis aestivalis, from May 11, to June 3, 



12 



11 



15 



6 



7 



9 



13 

 13 



