xlvi. ABSTRACT OP PROCEEDINGS. 



A valuable table is appended, from which the constants of the 

 ourve for any case may be found. A complete numerical example 

 illustrates the method of using the table. Details have been 

 avoided, but they may be found in the papers, by the same author, 

 that have been referred to in the notes. 



4. "Boogaldi Meteorite,'- by Prof. Liversidge, m.a., ll.d., f.r.s. 



This meteorite was exhibited by Mr. R. T. Baker, f.l.s., at the 

 June meeting of the Royal Society of N.S. Wales, when he stated 

 that it was found early in January this year at a place two miles 

 from Boogaldi, a post town fifteen miles north-west of Coonan- 

 barabran. Mr. Baker afterwards forwarded it to me for investi- 

 gation and analysis. 



Description — The meteorite is a metallic one or a siderite, and 

 is somewhat pear-shaped; it is a little over five inches long by 

 about three inches broad at the widest part, and it weighed before 

 cutting 2057*5 grammes. Its sp. gr. at 14° 0. was found to be 7*85. 

 It was covered, as usual, with a closely adherent skin of fused 

 oxides, except in one place where it had been detached, the 

 exposed metal had a bright lustrous appearance like nickel iron. 

 In places thin crack-like markings are present — some of these 

 are evidently closely related to the crystalline structure of the 

 mass within. A few pits are noticeable upon the surface, these 

 were probably due to the presence of granules of troilite, inasmuch 

 as some granules of this mineral (FeS) were found when making 

 the sections of the interior, cracks in the skin are seen starting 

 from these pits — these cracks appear to be distinct from the smaller 

 and regular ones meeting at definite angles, previously referred to. 

 In addition to the larger and deeper pits there are in places numer- 

 ous small ones which do not appear to be confined to the fused skin 

 of the meteorite, these small ones correspond to the burst gas 

 bubbles met with in slags and fused iron scale. There is however 

 a very remarkable structure in the skin, shown most clearly at 

 the two ends of the meteorite, which I have never observed before 

 in a meteorite. At the thick end of the meteorite the fused 

 oxides forming the skin have been thrown into well defined con- 



