OsMOTIC CONCENTRATION OF LEAF SAP 275 
Sample | Height A | da | « X 105 «{[AX 108 
Juglans cinerea L. JUNE 4, 1915 
ears te st 41 1.209 14.54 1,208 999 
fs Saar en ep pt 30 1.137 13.68 1,332 1,084 
Cree se oon 17 Terr 13.61 213 I,072 
Juglans cinerea L. JUNE 8, 1915 
Ages rte, eae | 45 1.049 12.62 1,435 1,368 
Toy Sates 24 I.015 2,27 1,252 1,234 
Gleditschia triacanthos L. AUGUST 25, I915 
Cee a eae ee | 46 1.419 57.07 927 | 653 
epee oe I5 1.285 15.46 938 730 
Platanus orientalis L. AuGuST 28, 1915 
eae ce 66 1.353 16.27 1,458 1,078 
Es Parmer grs 45 1.267 15.24 1,627 1,284 
( ORs ata 2t -127 13.56 1,588 1,409 
Quercus coccinea Wang. JUNE 30, 1914 * 
eer areas | 56 1.592 I9.14 98r 617 
fs Dae ar 33 1.383 16.63 848 613 
Quercus palustris L. JUNE 16, 1914 
bs es daptg poets aa 1.032 23:22 903 467 
Ti OS ee a3 1.728 20.77 1,002 580 
Cees 9 1.681 20.21 1,057 629 
Quercus Prinus L. JuNE 16, 1914 
Vee seas AT 1.683 20.23 1,523 667 
Fa Sy Neer ae 36 1.670 _ 20.08 1,283 768 
_Daeiree oe aay 30 1.640 19.72 1,314 801 
FH ese aes Sam 19 1.628 19.57 1,288 791 
Robinia Pseudacacia L. JUNE 9, 1914 
ee eS 45 1.050 12.63 | 1,536 | 1,463 
Peieretbactye 12 -902 10.86 1,458 1,616 
Robinia Pseudacacia L. JUNE 9, 1914 
gene 45 -969 11.66 1,232 1,272 
De ae aie 3 -932 It42 1,267 1,360 
| DERN Saas 24 O15 II.OL 1.362 1,488 
Robinia Pseudacacia L. JUNE 12, I914 
fe ne a ee 51 1.034 12: 1,277 1,236 
Se ae ara 39 20 11.07 1,181 1,285 
Cae 29 903 10.87 1,217 1,348 
D8 PREP Ae -887 10.68 1,340 1,511 
* In the cases of Quercus coccinea of June 30, samples taken at 61 and at 50 feet 
proved insufficient for a determination of freezing point lowering and have been 
combined to form a single sample arbitrarily placed at 56 feet. , 
