152 Intelligence and Miscellaneous Articles. 



Discharge. 



r K. , , i ■ , ^ 



Normal Diminished 



pressure. pressure. 



Atmospheric air ... . 10 18-22 



Oxygen 14 20 



Hydrogen 8 16 



Carbonic acid ..... 6 14 



Coal-gas 7 12 



Sulphuretted Hydrogen . . 3 



Air containing 

 vapour of 



Alcohol 30-40 about 70 



Ether 20-30 „ 50 



Turpentine 6 



Benzole 10-20 



Petroleum spirit .... 10 



Xylol 6 



In this the mean strength of the discharge in dry atmospheric 

 air is taken at 10 — Inaugural Dissertation, Bonn, 1891 ; Beibldtter 

 der PhysiJc, vol. xvii. p. 60. 



NOTICE OF A METEORIC STONE SEEN TO FALL AT BATH, 

 SOUTH DAKOTA. BY A. E. FOOTE. 



On the 29th day of August, 1892, about 4 o'clock in the afternoon, 

 while Mr. Lawrence Freeman and his son were stacking upon his 

 farm two miles south of Bath, they were alarmed by a series of 

 heavy explosions. On looking up they saw a meteoric stone flying 

 through the air followed by a cloud of smoke. Its course was 

 easily traced to the point where it fell within about twenty rods 

 from where they were standing. The stone penetrated the 

 hardened prairie to a depth of about sixteen inches, and when 

 reached it was found to be so warm that gloves had to be used in 

 handling it. Three small pieces of an ounce or two each had 

 apparently been blown off by the explosions, but the stone still 

 weighed 46| lb. One of these small pieces was found by some 

 men not far distant, and was broken up and distributed among 

 them. The explosions were plainly heard by a large number of 

 people at Bath, two miles away, and at Aberdeen, nine miles away, 

 it sounded like distant cannonading. The exterior of the stone 

 presents the usual smooth black crust. The interior is quite close- 

 grained, resembling in texture the stones from Mocs. The iron is 

 abundantly disseminated through the mass ; and although the grains 

 are small, they are easily distinguished and separated on pulverizing. 



Preliminary tests made by Mr. Amos P. Brown, of the Minera- 

 logical Department of the University of Pennsylvania, prove the 

 presence of nickel and cobalt in considerable quantity. — Silliman's 

 Journal, January 1893. 





