SAP DENSITY AND FREEZING POINTS OF LEAVES. 
107. 
108. 
109. 
110. 
127 
Degrees Centigrade 
Ampelopsis quinquefolia (no sap). 
Spiraea prunifolius (no sap). 
Gleditschia triacanthos .................... 1.595 
SS DIT em Thy ALTER UEC ta )R cero! sae awh, oa) ge ieee 1.566 
The following table is the arrangement of the species in 
the order of their freezing point lowering. The numbers 
following the names of the species represent the respective 
section to which they were referred in the tentative lists 
arranged directly after the freeze of 1910:— 
ee ee 
CRNA AAK WN RH SSHNAAAA YN oe 
bo po po to 
A be Be ee 
br bw bw bw 
PNA 
oo eo G9 bD 
eine ee: 
Degrees Centigrade 
Spiraea bracteata .. 6.02.0. n vce ees 2.03 
Viburnum Lentago (2)....2.............6. 1.943 
Syringa persica (1)......-.....cecrseseees 1.014 
DESY AQIS epi NUS eee ssacoce ts . ./0 eG ge ee meerowe 1.885 
Euonymus europaeus .......... 200s eee eens 1.856 
OOTTUISMNLAS GL Masts eer cin ksce ners a fae whe eee 1.7708 
Gymnocladus canadensis (4)............+.5: 1.74 
Ligustrum amurense (2) .......--+.-+.++: 
aitamtucernarut, (C9) 65 oa em soos cee co coec 
Syringa vulgaris var. (1).-.............--- 
Viburnum Opulis sterilis (2)............... 
Viburnum Opulis sterilis (2).........-...-. 1.624 
Symphoricarpos racemosus ...........+.--: 
Gleditschia triacanthos (4)........... as 1.595 
Spiraea Van Houttei (4)..............0000- 1.566 
Securinega fluggeoides (4)................5. 
erberis ilightoliges (4) caw eee oe. eet ease 
Sambucus Canadensis: (4G) 1. e.)c0 oe cr 
Cladrastisy vinCeanim (cei) oan | ie eee, 1.498 
Carpinus Betulus (4)...........eeeeeeeeeee 1.479 
SCT YA VINPINICR OU e ) s sln « ale mister ew 8 ais 1.45 
Ginkgo biloba eG. = clef sre apse meters ote we 
Berberis vulgaris Thunbergii (4)........... 
WVibUIMUIN CenUsGII (here e sue tr a tes 1.421 
Calycanthus MOMs © bie siete cin «sca cctiye «5 1.392 
IPlatanug: OCClOentalis:. (a) se oe, es 
Ibe bebe) (Obey (ies oa Be 1.363 
Aralia spinosa (4)................ 0c eee 
Hydrangea paniculata grandiflora (2)....... 1.3222 
Via T Bayo AREY Sa (0B) Were ears Sires Seep aatem pare 1.305 
Gleditschia aquatica (4).............e0 ee ee 
Liriodendron tulipifera (3)................ 
