CELL-CONTENTS AND FORMS OF CELLS. 197 



Abrin, occurring in the seeds of Ahrus precatorius; Curcin, in the 

 seeds of Jatropha Curcas; Crotin, in the seeds of Croton Eliiteria; 

 and Robin, in the bark of Robinia Pseudo-Acacia. The pollen 

 of rye is also said to contain a toxalbumin, which, when adminis- 

 tered in extremely small doses, accentuates the symptoms of hay 

 fever in patients afflicted with this disease. Under the name of 



Fig. 112. Phyto-globulins (crystalloids) from several sources: I, a, b. from the 

 white potato; II, a to f, from the seeds of castor oil plant (Ricinus cowmunis); m 

 b and b' are shown different views of the same crystal; III, a to i, from the seeds 

 of the Brazil nut iBertlwlleiia excelsa). — After Dippel in "Das Mikroskop. 



"Vegetable Agglutinins" have been brought those protein sub- 

 stances which when added to a suspension of blood-corpuscles 

 rapidly cause them to agglutinate. Those substances that pos- 

 sess the same properties but are not poisonous are known as 

 "Phasins." (Consult "The Vegetable Proteins," by Osborne; 

 and ''Beitrage zur Kenntnis der vegetabilischen Hamagglu- 

 tinine," by R. Kobert.) 



