1922] GORTNER & HOFFMAN—MOISTURE CONTENT 313 
refractometer reading more nearly expresses the true value of the 
moisture content than can be obtained by any known method. 
wv 
. 
UNIVERSITY FARM 
St. PauL, MINN. 
LITERATURE CITED 
GorTNER, R. A., and Harris, J. A., Notes on the technique of the deter- 
mination of the depression of the freezing point of vegetable saps. Plant 
World 17:49-53. 1914 
, On a possible ‘isto between the structural peculiarities of 
onal and teratological fruits of Passiflora gracilis and some physico- 
chemical] properties of their expressed juices. Bull. Torr. Bot. Club 4o: 
27-34. 1913 
Harris, J. ve Physical chemistry in the service of phytogeography. 
a 
Science N.S. 46:25-30. 191 
7: 
———., On the osmotic concentration of pe tissue fluids of phanerogamic 
qichpics. Amer. Jour. Bot. 5:490-506. 1 
5. 
> 
> 
yg 
————, On the osmotic concentration of the tieeue fluids of desert Loran- 
shacese: Mem. Torr. Bot. Club 17:307~315. 19 
Harris, J. A., and Gortner, R. A., Sicha cheanical properties of vege- 
table saps. II. A comparison of the physico-chemical constants of the 
juice of apples and pears of varying size and fertility. Biochem. Bull. 
3:196-201. 1914. 
Harris, J. A., GoRTNER, R. A., and LAwRENCE, J. V., Physico-chemical 
properties of vegetable saps. I. A comparison of the physico-chemical 
constants of the juices expressed from the wall with those from the included 
capillary whorl in proliferous fruits of Passiflora gracilis. Biochem. Bull. 
4252-78. IQIs. 
———., The relationship between osmotic concentration of leaf sap and 
the height of leaf insertion in trees. Bull. Torr. Bot. Club 44: 267-286. 1917. 
———,, The osmotic concentration and electrical conductivity of the tissue 
fluids of ligneous and herbaceous plants. Jour. Phys. Chem. 25:122~146. 
1921. 
Hanes: J. A., and Lawrence, J. V., Cryoscopic determinations on tissue 
fluids of plants of Jamaican coastal deserts. Bor. Gaz. 64:285-305. 1917. 
, The osmotic concentration of the sap of the leaves of mangrove 
trees. Biol. Bull. 32: 202-211. 1917. 
, The osmotic concentration of tissue fluids of Jamaican montane 
rain forest vegetation. Amer. Jour. Bot, 4:268-298. 1917. 
, ———, On the osmotic pressure of the tissue fluids of Jamaican Loran- 
neces parasitic on various hosts. Amer. Jour. Bot. 3:438-455. 1916. 
s, J. A., Lawrence, J. V., and Gortner, R. A., The cryoscopic 
aici of ceprenied vegetable saps as related to local environmental 
conditions in the Arizona deserts. Physiol. Res. 2:1~-49. 1916. 
