Dec, 1921] 



PATON 



POLLEN AND POLLEN ENZYMES 



48I 



built, if there is a parallelism with the chemical composition of animal 

 sperms. 



Table 2. Analysis of Pine Pollen, Przybytek and Famintzin, 1885 {figures indicate per- 

 centages) 



Water 6-79 



Ash 



Calcium oxid 35- 2 3 



Sodium oxid 3-62 



Magnesia 7-°° 



Calcium °-88 



Iron and aluminum oxid 5-3° 



Phosphoric acid (anhydrous) 29.86 



Sulphuric acid (anhydrous) J4-83 



Chlorine °-99 



Manganese a trace 



Table 3. Stiffs Analyses of Pollen from a Cattle-fodder Beet and from two Varieties of 

 Sugar Beet {figures indicate percentages) 



Fodder Beet, 

 1895 



Protein 



Nitrogenous substances not protein. 



Fat (ether extract) 



Starch and dextrin 



Pentosan 



Other nitrogen-free extractives 



Crude fiber 



Ash 



Water 



15-25 



2.50 



3-18 



0.80 



11.06 



23.70 



2545 

 8.28 

 9.78 



Sugar Beet, 

 1895 



16.90 



2.77 



3-52 



0.89 



12.26 



26.27 



28.21 



9.18 



Sugar Beet, 

 1900 



16.68 

 5.82 



547 

 0.89 

 7.27 

 28.86 

 27-95 

 7-13 



Table 4. Heyl's Analysis of Ragweed Pollen {1917) 

 Alcohol-soluble (42.9 percent) contains (in percentages): 



Moisture 5- 2 8 



Starch (diastase) -°° 



Crude fiber I2 - 2 ° 



Pentosans ' "■ 



Protein 2 -b4 



Nitrogen in alcoholic extract I -°° 



Ash 5-39 



Dextrin 2AO 



Fat io ^° 



Lecithin °-~ 5 



Ether-soluble, but not ligroin-soluble x -75 



Sucrose ^ 



Glucose u6 ° 



Resin J 7-40 



A nitrogenous base trace 



From the above review and from the analyses given in tables 1-7 it is 

 clear that our knowledge of the chemistry of the pollen of the very numerous 

 species of flowering plants is very limited. It is a discouraging problem 



