398 J-HILOSOPHICAL TRANSACTIONS. [aNNO 1730. 



ton had gone on with it in his book. There we saw that great man's applica- 

 tion in fol. 330, that he had done it cum Ol. Vitr. et Sp. Vin." 



This of Sir Isaac Newton, is the vini ethereiis ; only there is a difference in 

 the process : the liquor ethereus, is made with equal parts in measure, not 

 weight. The upper yellow liquor is separated from the inardent sulphureous 

 per tritorium. The inferior liquor is thrown away; and the superior yellow is 

 put into a retort to be distilled with the most gentle heat; and the extraction 

 oC the ethereal liquid continued so tar, till the superior hemisphere feels cold, 

 and the retort being clapped in the hand, there is found in the receiver a vino- 

 sulphureous gas, very ethereal. Let the sulphur be precipitated by adding an 

 alkali, and gently throwing it in till all ebullition ceases, and the liquor will 

 not farther strike itself against the hand, but will strangely attract it. Then the 

 alkali will go to the bottom of itself, or precipitate itself in the common water. 



^n j4ccoiint of the Hermaphrodite Lobster presented to the Royal Society May 

 the 7th, hij Mr. Fisher of Netugate Market, examined and dissected, pursuant 

 to an order of the Society. By F. Nicholls, M. D. F. R. S. N° 4 1 3, p. 29O. 



The world has frequently been amused with appearances proper to both the 

 sexes, in persons who have from thence termed themselves hermaphrodites: 

 but such of these as have passed a more strict examination, have proved, that 

 those appearances were either morbid cases, or preternatural formations of the 

 parts proper only to one sex. 



But in those animals whose parts of generation are double and independent 

 on each other, as the lobster, crab, and many birds, the parts proper to both 

 sexes may possibly be formed in the same subject. 



In order to illustrate this, Dr. N. gives a short account of the structure of 

 the male and female lobster, so far as relates to the difference between the two 

 sexes, and then shows in what manner they were combined in the present subject. 



It has already been observed that the lobster, both male and female, has all 

 the parts of generation double, except that the female has one passage only, 

 through which it is probable the ova are emitted out of the trunk, in order to 

 be affixed to the small appendages under the tail. 



The penis of the male lobster arises from the testicle, and is no more than a 

 continuation of the vas deferens; it is reflected and retorted once, after which 

 it grows thicker, as to its substance, probably forming a corpus cavernosum, 

 and terminates, not in the last leg but one, as Willis, in his Treatise de Animd 

 Brutorum, has observed, but at a small perforated tubercle in the first bone of 

 the last leg. 



Between the two last legs and the two legs above them are two processeSj 

 which from their resembling the nymphae of women, may be termed nynipbae- 



