ADVANTAGES OF GAS LIGHTS. 291 



^osed would be thrown off, but was astonished to find a dis- cal gas ctoIy- 



engai^eme:it of ammoniacal gas. *'^' 



The experiment was repeated with common charcoal, with Charcoal gave 



exactly the ^ame result. *^'f ^^™^ ""e- 



. . „ , suit. 



Azote IS one of the component parts of ammonia. Now, -yy-r^ 



as this base is not contained in either potash, v^ater, or char- the nitrogen? 



coal, whence did it arise, to form the ammoniacal gas .'' 



Is it one of the component parts of potash .'' or is this sub- Is it a compo- 

 stance a triple compound, formed of oxigen, azote, and the "*^'^* ^^J^ **^ 

 peculiar metal, which Professor Davy has discovered ? 



Nascent hidrogen sometimes combines with the azotic por- The ammonia 

 tion of atmospheric air, and forms ammoniacal gas; but "°'^ ^''O'" "^s- 

 this is not the case in my experiment, for, if the fire of the combinine°^^'* 

 mixture of charcoal and potash be extinguished by water, with the ni- 

 aud it is then immediately placed under a bell glass contain- ^j^^" ^ere* 

 ing atmospheric air, the oxigenous part will be absorbed, 

 and the azotic air, will be left behind. 



No carbonic acid will be formed. 



I am. Sir, 

 Your humble servant, 



JAMES WOODHOUSEo 



Vill. 



On, the Advantages of employing Coal Gas for Lighting small 

 Manufactories, and other Purposes, In a Letter from 

 Mr. B. Cook. 



To Mr. NICHOLSON, 

 SIR, 



I 



Have taken the liberty, from reading in your Journal for j^ ^^ .j |^ 



September, the paper of Mr.Murdock on the gas light, to ad- beneficial to 



dress the few following remarks to you. The more the advan- ^^^'^ ^^^^ . 



o . -^ vantage ot gM 



tage ansmg from the use of gas is clearly stated, the more ge- light dearly. 



nei-ally and simply it is explained, to induce manufacturers 



and others to make use of it, 1 think the better; especially 



jiow, through the present rupture with Russiai and the other 



U 2 northertt 



