2? 



? tlic country whence they were imp6rted. That they are 

 very penetrating even without losing their virtue we have 

 a proof from the loadstone, whose effluvia pass througli 

 the most solid bodies without any change of their force. 

 That they occasion great changes in organized bodies 

 we have a remarkable proof in a case lately published 

 by Dr. Heister : " Making an afternoon's visit to tl*e 

 liev. Mr. Sentag, he received me in an apartment where 

 there were three or four flower-pots with white lillies, 

 I asked him if he did not find his head affected when he 

 continued long in the room where they were, and told 

 him physicians thought them dangerous, and I my.seH' 

 -could not bear them. I therefore begged the window 

 might be opened that the effluvia might be dispersed. 



" He ordered the wmcknv to be opened, and re- 

 ;plied, he found no inconvenience from them, being a 

 tall, strong, healthy man. But the smell being still toe 

 .powerful for me, I was obliged to take my leave of him 

 sooner than I intended, 



" The night following lie was seized with an apo- 

 plexy : Dr., Bayer and myself were sent for; we fo\nd 

 him with his eyes wide open, but without speech, sense, 

 or motion. I told Dr, Bayer what had passed the day 

 'before: we ordered bleeding, blisters, and strong fric- 

 tion of the soles of the fret, head, and hands, with the 

 other remedies usual in these cases, but without success; 

 for the next morning he began to rattle in the throat., 

 and soon after died." 



This may admonish those to whom these odours are 

 not sensibly prejudicial not to stay long within the 

 sphere of their activity. 



In some places -effluvia from the earth produce many 

 effects on the surface of it. The bubbling and boiling 

 fountains in England and other countries are chiefly oc- 

 casioned by the bursting up of their effluvia. Our 

 burning well in Lancashire has no peculiar property in. 

 <i!s water ; but an inflammable vapour rising through it 

 makes it boil and bubble on the surface. And this va- 

 pour, as soon as set at liberty from the water, will take 

 flame at a lighted candle. 



voj., TV. " c 



