Protoplasmic Structure 47 



cron), the diameter of the organism shown in 

 Fig. 7 should be about fifty Angstrom units (five 

 millimicrons), which is about the size of the indi- 

 vidual bacteriophage organisms as determined by 

 nitration. 



Percentage Elementary Composition of Proteins 



C H N S O 



Egg Albumin 51.5 6.76 18.1 0.96 22.7- 



Casein 53.0 7.00 15.7 22.7- 



Edestin 51.5 7.04 18.7 0.88 21.9- 



Fibrin 52.9 6.90 16.6 1.18 22.4 + 



Gelatin 49.4 6.80 18.0 0.70 25.1 



Gliadin 52.7 6.86 17.7 1.03 21.7 + 



Hemoglobin 54.8 7.00 17.2 0.65 19.9 - 



The elementary composition of a protein will 

 also indicate to some extent the probable nature 

 of the connecting complexes. For example, if the 

 spirazines are connected in the manner shown in 

 Fig. 2, then we may take as a representative por- 

 tion thereof a complete triple junction and one- 

 half of each of the three adjacent spirazines. 

 This will have the following empirical formula : 



C 10 H 13 N 3 Os, 



and will have the following, percentage compo- 

 sition : 



Carbon Hydrogen Nitrogen Oxygen 

 53.9 5.8 18.8 21.5 



