MEDICINES. 413 



Equivalents, 



A table-spoonful is equal to half an ounce by measure. 



A dessert-spoonful is equal to two fluid drachms. 



A tea-spoonful is equal to one fluid drachm. 



A wine-glassful is equal to one and a half fluid ounce. 



The surest way, however, to get the true quantity is to 

 have the article measured by properly graduated weio-hts 

 and measures. It will not, however, be necessary to weicrh 

 each powder separately. Thus, half a pound of ginger 

 can be easily divided into ten or twelve equal parts with 

 a knife, without the trouble of weighing each powder 

 separately. 



