164 



STUDIES IN SEEDS AND FRUITS 



Some Results illustrating the Absence of a true Hygroscopic 

 Reaction in Impermeable Seeds, the Slight Variation being 

 Instrumental. (Daily observations made in the shbrt experiments 

 only.) 



II. Permeable Seeds. (Hygroscopicity 2 to 5 per cent.) 



(The hygroscopic range of a seed is the amount of variation stated as a percentage 

 of the average weight. Thus, if a seed varied between 98 and 102 grains, the range 

 would be 4 per cent. The methods of obtaining these results are described a page or 

 two back.) 



Hygroscopic 

 range. 



Average weight of 

 a seed in grains, 



iEsculus Hippocastanum (Horse-chestnut) 

 Allium ursinum .... 

 Anona muricata (Sour Sop) . 



,, palustris .... 



„ reticulata (Custard Apple) . 



,, squamosa (Sweet Sop) 

 Bignonia (species of) . 

 Canavalia ensiformis ... 

 Chrysophyllum Cainito (Star Apple) 

 Citrus decumana (Shaddock) 

 Datura Stramonium 

 Dolichos Lablab .... 

 Faba vulgaris (Broad Bean) . 

 Hura crepitans (Sandbox Tree) 

 Iris foetidissima .... 

 Luffa acutangula (Loofah) . 

 Phaseolus multiflorus (Scarlet-runner) 

 Pisum sativum (Peas) wrinkled 



,, ,, smooth 



Primula Veris (Primrose) 

 Ravenala madagascariensis (Travellers' 

 Ricinus communis (Castor Oil) . 

 Sapota Achras (Sapodilla) . 

 Scilla nutans (Bluebell) 

 Swietenia Mahogani (Mahogany) . 

 Tamus communis 



Palm) 



4*5 per cent. 



=»•« „ 



2-6 ,. 



2*8 „ 



3"3 >. 



3*5 >. 



2*5 » 



'•8 .. 



2*4 ., 



3'o » 



1*1 ,, 



4'o » 



2'2 „ 



4'o „ 



2'2 » 



5'o ,. 



6-0 „ 



4*5 .. 



4*1 I, 



2*0 ,, 



''5 » 



'•9 » 



4"o ,. 



2"o ,, 



4*0 „ 



130*0 grams. 



0-I2 „ 



6-0 „ 



4'o 



4*o ,. 



S'o 



5'o 

 24*0 

 120 



■5 



'o 



*0I2 

 'O 



3*1 



5 7 

 3*25 



