1823.] Scientific Intelligence. 313 



VI. Alhohometrical Application of the Thermometer. 



In the Annals for October last (p. 395), we gave an account of 

 M. Groening's discovery on this subject; and we now present a tabu- 

 lar view of the results of his experiments : 



Spirits of wine holding, ac- Temperature of the Temperature of the 



cording to Tralle's alcoho- boiling liquid, ac- vapours, according to 



meter at a temperature of cording to Fahren- Fahrenheit. 



60° Fahrenheit. heit. 



Per cent, of alcohol. 



95° 173-18° 170-37° 



90 174-31 171-5 



85 174-87 172-06 



80 ...<,.-.... 175-46 172-63 



75 176-56 173-75 



70 177-71 174-87 



65 178-83 1760 



60 17940 176-56 



55 17997 177-12 



50 181-62 178-83 



45 18219 179-40 



40 133-31 180 5 



35 1850 — . 



30 187-25 185 



25 189-50 187-25 



20 192-40 19062 



15 195-77 1940 



10 200-84 199-06 



5 20530 204-12 



2120 210-0 



VII. Account of a new Mineral, named Chloropal. 



Prof. Bernhardt of Erfurt, and Dr. Rudolph Brandes, have given 

 the description and analysis of a new mineral, which they call Chloro- 

 pal, and of which they distinguish two varieties, the conchoidal and 

 the earthy. 



It occurs not far from Unghwar, in the Comitate of the same name, 

 and had received the trivial name of green iron earth. The conchoidal 

 variety is pistachio-green, the powder yellowish-white ; it is scarcely 

 translucid on the edges, fracture conchoidal, hardness between fluor 

 and calcareous spar, fragile ; its specific gravity, according to the mean 

 result of different experiments, approaches very nearly to 2,000. The 

 parallelopiped fragments into which it is apt to break have on the face 

 which, in their natural place, has been turned upwards, a posi- 

 tive magnetic pole ; on its lower face a negative. Four other poles 

 occur on the lateral edges, of which two adjoining are positive, and 

 two opposite negative. The mineral has, therefore, three magnetical 

 axes, which pass each other at right angles, and agrees in that respect 

 with opal ; but is fjuite different from quartz and other similar minerals : 

 it does not phosphoresce. 



The earthy variety has the same magnetic properties as the former ; 

 its fracture is earthy; its specific gravity 1,870; that of another piece 

 1,727. Both occur with opal. 



