394 Miscellaneous Intelligence. 



lungs, entertained by Scheele, Fontana, and others. The air 

 was expelled from the lungs as much as possible, the mouth- 

 piece of a bladder containing 30 cubical inches of the gas ap- 

 plied to the mouth, and the gas inhaled at two inspirations. 

 An oppressive difficulty of respiration and a distressing con- 

 striction at the mouth of the stomach were the first sensations ; 

 these were followed by abundant perspiration, a general tremour 

 over the whole body, seeming to commence at the knees ; an ex- 

 traordinary sense of heat, slight nausea, and violent head-ach. 

 My eyes beheld things but indistinctly, and a deep murmuring 

 sound was in my ears. After a short time, all these effects ceased, 

 except that of heat, which increased in an alarming manner ; but 

 ultimately, by the abundant use of cold drinks, I was restored to 

 my original state of health. — Giornale di Fisica, viii. 295. 



8. In a Mixture of Muriate of Potash and Muriate of Soda to 

 determine the Proportions of each. — As the nitrate of silver is the 

 most delicate and convenient precipitant, by which we can ascer- 

 tain the quantity of muriatic acid in combination with these 

 bases ; and the quantity united to each being certain, but different 

 (relative to their atomic weights,) which difference is sufficiently 

 great for experimental purposes ; hence the quantity in the mix- 

 ture varies relative to the proportions of each. 



The test may be rendered more commodious for analytical ex- 

 periments, by using it in the state of solution, of known strength 

 or specific gravity, and by means of a graduated tube. 



Then let W=tne number of grains of the mixed salt operated on. 

 a=the grain measures of the test which W grains of 



(p) would require. 

 &r=the grain measures of the test which W grains of 



(9) would require, 

 crrthe grain measures of the test which W grains of 

 the mixture operated on have required. 



Suppose #=grains of (p) contained in W grains of the mixture. 

 W—x— grains of (9) ditto, ditto. 



W.q b a 



^ A x.p + W-x.q _ a 

 W. p a 



Wx + W-xJL-W.L. 

 p a 



:.x-xL=w. \---\ 



a |a aj 



