286 VOLATILE OILS 



7. Toxic and Ecbolic Volatile Oils. 



All volatile oils are toxic in large doses. Although it is im- 

 possible to exclude systemic effects altogether, the toxic action is 

 due almost entirely to local irritation. The symptoms are gastro- 

 enteritis with nephritis as a common sequel. The inflammation of 

 the gastrointestinal tract may spread to the pelvic organs and thereby 

 produce abortion. 



Most important are : 



Sabine Hedeoma 



Tansy Apiol 



Eue 



8. Volatile Oils Used in Dentistry. There are certain 

 volatile oils used in human dentistry which it seems best to include 

 in this group. They are employed for the twofold purpose of dis- 

 infecting the cavity and destroying the nerves of carious teeth. 

 Most important are: 



Cloves Sassafras 



Cinnamon Wintergreen 



(Creosote) 



9. Volatile Oils Used as Insecticides. Certain volatile oils 

 or drugs containing them are used to kill or repel certain insects, 

 such as mosquitoes, flies, etc. 



Most important are : Insect powder, Persian insect powder (the 

 powdered flowers of the pyrethym species), and Dalmatian powder 

 (the powdered flowers of Chrysanthemum cinerarisefolium), eu- 

 calyptus, menthol, cedar, lavender, hellebore, anise. 



