1882.] Dr. W. Flight. On Meteorites. 343 



and if we equate to zero the coefficients of a 5 , x z , x, we shall have the 

 equations — 



(a, b)(w, 1)=0, 



(a, b, c, d)(w, 1) 3 =0, 



(a, b, c, d, e,f)(w, 1) 5 = 0. 



Whence, eliminating w between the first and second of these, we 

 obtain — 



(a, b, e, d)(b, — &) 5 = 0, 



(a, b, c, d, e,f){b, — a) 5 = 0; 



or, developing the expressions, 



aH-3abc + 2b*=0 ....... (1) 



as before, and 



ay-5a 8 ic+10a?62d-10a6 s c+46 3 = .... (2). 



In order to bring this to the same form as the condition found by 

 the other method, we have only to write, for (2), the following, viz., 



3(2)-10& 3 (l) = G, 



which gives 3a±f-15a*be-j-20a2bH-8b°=Q, 

 as before. 



It is unnecessary to pursue the subject further, as the method is 

 perfectly general and obvious in its application. 



II. " Report of an Examination of the Meteorites of Cranboume, 

 Australia; of Rowton, Shropshire; and of Middlesbrough, 

 in Yorkshire." By Walter Flight, D.Sc, F.G.S., of the 

 Department of Mineralogy, British Museum, South Ken- 

 sington. Communicated by H. Debus, Ph.D., F.R.S. Re- 

 ceived January 19, 1882. 



(Abstract.) 



I. — The Siderites of Cranboume, near Melbourne, Australia. 



The large masses of meteoric iron found at Cranboume, near Mel- 

 bourne, Australia, were known as far back as 1854. The larger block 

 was bought by Mr. A. Bruce, now of Chislehurst, for one sovereign, 

 who determined to present it to the British Museum. The smaller 

 mass, weighing a few hundredweight, became the property of Mr. 

 Abel, and was sent to the International Exhibition of 1862. When 



