32 THE SIMPLER NATURAL BASES 



The pulmonary arterioles, however, are constricted and the pulmon- 

 ary blood pressure is raised. This combination of a vasodilator fall of 

 systemic blood pressure with a vasoconstrictor rise of pulmonary pres- 

 sure has been described as characteristic of the action of ergot (Bradford 

 and Dean [1894]), and is doubtless due to the iminazolyl-ethylamine 

 present in the drug. For the effect of the base on the pulmonary 

 vessels consult Baehr and Pick [1913, 2], and on the frog's blood 

 vessels, Handovsky and Pick [1913]. 



Finally it should be mentioned that iminazolyl-ethylamine has a 

 weak stimulant action on the salivary glands and on the pancreas, 

 qualitatively resembling that of pilocarpine, which alkaloid also contains 

 a glyoxaline ring. The action on the pancreas is not at all like that 

 of secretine, being abolished by a small dose of atropine. 



