mSS Gafeous Oxyd of Carlotu 



wires extended in the diredron of the ilnendian. Voha, in 

 coufa^uenct of this pecuharity, afcribed the phacnonienon to 

 the magncttc fluid:, and fpeaks of it in his works. !• do not^ 

 bowercFy know that this i>e\v effect of a flmd fa Taniverfally 

 diffiifcd' has been fuflicicntly examined. 



*■' Mr. Haas jan. inforracd me that the wires ought at leaft 

 to be a hundred feet hi length (thofc of his father were about 

 three hundred), and that they muft be ftretched as much as, 

 po^ble t they do mot fiomid tiH they have been expofed to the 

 air fo*r feveral weel<s^. Mr. Haas fen. liad extended, for Tome 

 limCy ibiirteen, of d liferent fizesj which emitted fometimcs 

 verv sgreeabb founds.*' ff 



Hum.boldt at Caraecas, fn South America, has made fome 

 mtereftiiTo; obfervaiijons on, the motion of the barometer near 

 tibc equator. ** I have read," fays he, " in the Tranfaftions^ 

 of the Bengal Society, that the barometer rifes and falls there 

 rcgulifcrly every twenty -four hours. Here, in South America, 

 its ii»€>tion- i&niore aftoniOiing. There are fjur atmofpherical 

 tidies every twenty-four hours,, which depend only on the 

 4tt:r2b£)tEon of the fun. The mercury faUs from 9 o'clock in 

 the morning till 4 ©'clock in the evenkig. It rifes from 4 till 

 11 o'clock;, it falls from 11 o'clcKk till half paft 4 in the 

 anjonitng^ k reafcends from that time till 9 o'clock : neither 

 winds, ftorms, nor earthquakes, have any influence on this 

 ln.otroa." This fa6l goes a great way towards proving the 

 general' truth of Mr. Ilow^ard's theory, given in the PhiJo- 

 Ibphical Magazine,, VoL VIL 



GASEOTTS OXTD OF CARBON, 



TlVi? name is given, by Mr. Cruickfliank, of Woolwich, 

 ««• thei-nfiammablc jras hberated from a mixture of fonxe-fcalefi 

 <f)f iron 3>nd charcoal, the production of which has been held 

 ^- Dr. Prielllev as a proof of the truth of the phlogiftic theory,, 

 as water could not be fwppofed prefen.t to aflift in producing, 

 the z'^^ by being decompx)fed. 



^If fcales of iron and charcoaT, both previGufly ignited ta 

 rfr*ve off every kind of moidure, be introduced into a coated 

 glai^ retort, m into an iron one, and tl»e retort be expofed, 



conne<5ied 



