306 Expulsion of Tcenia hj Oleum Tcrelinlhince. 



fervesced a little. It was in this state that I submitted it 

 to distillation in a stone retort, as 1 had done with respect 

 to the lime potash. The results of the operation were ab- 

 solutely similar ; and when I removed the potash from the 

 retort, it was white, and exhibited some effervescence. 



I should in all probability have obtained the same results 

 with soda purified by lime, if I had subjected it to the same 

 experiments, considering the great resemblance which exists 

 between these two alkalis. 



In order to assimilate my experiments a little- with those 

 which are performed on a great scale in the soap-works, 

 it remained to form the caustic lixivium of the soap-makers, 

 and to observe what took place in this operation. With 

 this view I made a paste with 500 grammes of pulverized 

 alicant soda, and 250 grammes of lime newly slacked. I 

 diluted it in water, and left it ten or twelve days at a tem- 

 perature from 10° to 15° of Reaumur in a proper apparatus. 

 Some bubbles of azotic gas only were set free. Although 

 the result of this last experiment teaches us nothing satis- 

 factory, I am not less inclined to think that the hydrogen 

 gas, whether pure or carburetted, which is produced in soap- 

 works, is owing, as 1 have observed above, to the decom- 

 position of water by charcoal. In fact, it is not to be 

 doubted that the circumstances of this experiment are ex- 

 tremely different from those which we meet with in the 

 manufactories where large masses are operated upon, or 

 where '.he soda employed is better adapted for the opera- 

 tion, either from containing more charcoal, or from being 

 in more minute division. In short, there is a variety of cir- 

 cumstances which must' necessarily modify the results. 



LVIII. Cases illustrating the. Effects of Oil of Turpentine 

 in expelling the Tape- worm. 



Case I.' 

 By John Coakley Lettsom, M. D. and President of the 

 Medical Society. 



JCiARLY in September 1809, I was consulted by J. 1\ esq., 

 about thirty-five years of age, on account of an uneasiness 

 in the abdomen, with dyspepsia, which were supposed to 

 originate fitofri Uenia, or tape-worm, as small portions of it 

 had occasionally been evacuated bv the rectum. 



I prescribed a course of the male fern, with occasional 



* From Transactions of the Medical Sscietij of London, vol. i- part I. 



caihartics, 



