1820.] Scientific Intelligence. 395 



coal, but to the combustion of part of it from the long continued 

 action of the heat, as the crucible, though covered with a lid, 

 was not impervious to air. 



One grain of this coal, when mixed with peroxide of copper, 

 and exposed to a strong red heat, formed 7-06 cubic inches of 

 carbonic acid gas ; "and no water whatever nor azotic gas was 

 evolved. Now seven cubic inches of carbonic acid gas contain 

 0*893 gr. of carbon. Hence the grain of coal consisted of 



Carbon 0-893 



Ashes 0-040 



Deficiency 0-067 which must have been oxygen. 



Now 0-893 gr. carbon and 0-067 gr. oxygen, when converted 

 into volumes, are very nearly 



7 cubic inches carbon, > 



0-2 cubic inch oxvgen. 



Which is equivalent to 



35 atoms carbon = 26*25 



2 atoms oxygen = 2-00 



28-25 



So that Kilkenny coal differs essentially in its composition from 

 every other species hitherto examined. 



XIII. Geogj'aphicalPositio/is on the Coast of Da I mat ia determined 

 bi/ Copt. G. II. S/nj/t/i. 



Latitude. 



* Corfu Fort Alexandre sur Vido . . 



+ Cape Bianco (Corfu) 



+ 



+ 



+ 



+ 



Cape Drasti (Corfu) 



Merleru (isle) 



Fano (west point) 



Port Palermo (the castle) 



— Strada Bianca . . ; 



— Valde Orsa 



* Saseno (isle, on the hill) 



+ Aulona (Douanne) 



— Pointe Saraana (centre) 



— Cape Laclii (tower) 



+ Durazzo (the highest marabut) . . 



— Cape Pali 



+ Cape llodoni 



— St. Jouan di Mediin 



— Duleigno (Marabut) 



— Autivitri (Point) 



* Biidiia (St. Nicolas) 



— Point d'Ostro de Cattaro 



+ S. Marco (isle, the fort) llagusa, 



,39° 38' 



,39 20 



,39 47 



,39 52 



,39 50 



,!40 2 



j40 8 



,40 19 



,40 29 



,|40 27 



!40 48 



!41 10 



141 17 



41 23 



42 15 



42 23 

 42 37 



5" 

 50 

 10 

 •50 

 20 

 55 

 45 

 12 

 10 

 15 

 55 

 10 

 32 



5 

 35 

 20 

 50 

 17 

 45 

 30 

 45 



Long. E. P'erro. 



37° 



37 



37 



37 



36 



37 



37 



37 



36 



37 



36 



37 



37 



37 



37 



37 



36 



36 



36 



36 



35 



35' 23" 



46 35 



21 45 



14 55 



59 35 



27 55 



17 15 



20 



53 57 



6 5 



57 22 



5 5 



6 20 

 3 59 



7 55 



8 45 

 50 25 

 46 10 

 30 32 

 10 35 

 44 20 



(Correspuu'.lencw Astronomiquc, i. 4'J6.) 



