- 69 - 



limette. Like the latter, the sesquiterpene found absorbs 3 molecules 

 hydrochloric acid (melting point of the hydrochloride 79 to 8o°) and 

 6 atoms bromine (melting point of the bromide 154 ). 



New Pharmacopoeias. 



In our last Report we have already published a summary of the 

 requirements specified by the new American Pharmacopoeia for 

 the essential oils admitted to it, and we stated at the same time 

 that a discussion of the details was at that moment not possible, but 

 would follow in the present Report. In the meantime, two more new 

 Pharmacopoeias have appeared, namely the seventh edition of the 

 Spanish Pharmacopoeia which has recently come into force, and 

 the eighth edition of the Austrian Pharmacopoeia which takes 

 effect from the I st July 1906. As on previous occasions, we will in 

 the following pages briefly quote the requirements specified in the 

 various Pharmacopoeias for the essential oils, and in each case discuss 

 whatever may need supplementing or correcting, as that will be the 

 best way of preventing any misunderstandings which might arise in 

 judging individual oils on the basis of the Pharmacopoeia in question. 



The new (IV.) Dutch Pharmacopoeia unfortunately only reached 

 us after the editorial portion of this Report was closed, and we therefore 

 reserve a discussion of same for the next October Report. 



American Pharmacopceia. 



(The Pharmacopceia of the United States of America, 

 8 th decennial revision). 



The new edition of the American Pharmacopceia has deservedly 

 met with general approbation. There are everywhere evidences of a 

 serious effort to make the widest possible use of the achievements 

 of Science; particularly this is the case in the directions for testing. 

 This also applies especially to the essential oils, which are mostly 

 described in detail in such manner that the American Pharmacopoeia 

 may in this respect be characterized to a certain extent as typical, 

 This favourable opinion of the whole does not preclude that some 

 statements made in the Pharmacopoeia are not correct, and also that 

 several directions for testing call for criticism. For the sake of expediency, 

 we will first of all discuss in a connected form, the specific gravities 

 specified by the Pharmacopoeia, and then deal with the oils themselves. 



As already mentioned by us in our Report of October 1905, p. 74, 

 the new American Pharmacopceia does not indicate the specific 



