On the Use of Sulphur as a Fermifhge, 7i 



infitead of twenty, and there is consequently reason to be* 

 lieve that it may yet be made far more powerful. 



Aware of the reception which this extraordinary fact, so 

 contrary to estabhshed opinions, is Hkely to meet, I have 

 aoqght, and been so fortunate as to find, additional support, 

 in further experiments, and the construction of another 

 engine materially different from the first, which, however, 

 produces similar, and indeed greater effects. 



More of this shall be the subject of my next paper ; and 

 in the mean time, those of your numerous readers, whp' 

 may think with me, that the means of gaining power cannot 

 be limited to the two which I have thus announced, have a 

 wide field opened for the exercise of their genius in this re- 

 search. I have the honour to be, sir, 



Bracknell, y®"^ Very humble servant, 



Feb. 23, 1808. E. Y. 



XVII. On the Use of Sulphtr as a Vermifuge* By Joseph 

 Hume, Esq,, of Long- Acre y London* 



To Mr. Tilloch. 



AViNG been favoured with some additional information 

 respecting the efficacy of sulphur, and the proper way of 

 applying it to vegetables, I now fulfil the conditional pro- 

 mise I made in my last letter*. The method is truly sim- 

 ple ; for nothing more is required than to sprinkle sublimed 

 aulphur, or, as it is commonly called, flowers of brimstone, 

 over the leaves of the tree or plant, wherever the effects of 

 worms or insects prevail, or may be expected to come. 

 This may be sq easily accomplished, that it seems super- 

 fluous to point out any particular plan or apparatus. The 

 sulphur may be tied up in a piece of muslin or linen, and 

 with this the leaves and young shoots should be dusted ; or 

 it may be thrown on by means of a common swandown 

 puff, or even a dredging-box. However, if this practice 

 become general, no doubt some convenient instrument, 



? Phil. Mag. vol. xxlx. p, 353. 



E 4 . probably 



