1913.] EXCHANGE VALUE OF METEORITES. 527 



Saline, 79 cents ; Trenton, 23 cents and 42 cents ; Wichita, 35 cents ; 

 Zaborsika, $8.00 ; Zacatecas, 78 cents. 



No prices are omitted from the collation because of being too 

 low. The following however are some of those which are more 

 than 50 per cent, lower than the next higher price or Wiilfing's 

 value, where no other price is given. In the writer's opinion these 

 figures are too low. Nearly all are for fragments of a few grams. 

 Bath, 20 cents; Black Mt., 33 cents; Bustee, $1.00; Copiapo, 33 

 cents; Dalton, 6 cents; El Capitan, 11 cents; Harrison Co., $1.00; 

 Ibbenbiihren, $1.50; Le Pressoir, $1.25; Mantos Blancos, 38 cents; 

 Motta di Conti, 38 cents;, Nammianthal, 75 cents; Orvinio, $1.20; 

 Pipe Creek, 17 cents; Pirgunje, $1.50; Reed City, 13 cents; Rich- 

 mond, $1.20; St. Denis Westrem, $1.00; Salt River, 91 cents; Uden, 

 $2.00; Yatoor, 33 cents. The lowest Toluca price is based on 

 several slices. One small complete mass listed in the same catalogue 

 at I cent per gram is excluded. The iron-shales resulting from the 

 oxidation of the Canyon Diablo and Augustinovka irons are omitted. 

 The Wiilfing (1897) exchange values of the following falls are not 

 quoted, as their subsequent re-classification probably gave them new 

 group weights : Barratta, Carlton, Eagle Station, Crab Orchard, 

 Dakota, Imilac, Kendall County, Mejillones, Salt River, Shingle 

 Springs, Summit and Zaborzika. Wiilfing's value for Fisher is 

 omitted, being erroneous because based on incomplete data. 



Only seven dealers issue catalogues. Two American and one 

 European publication have names and prices printed and are not 

 annual, being dated 1912, 1907 and 1908 respectively; two European 

 have names printed but prices written in, while two small European 

 lists were merely typewritten. 



Rose-Tschermak-Brezina Symbols/^ 



A Angrite Ceo Ornansite 



a veined • Cek Crystalline Enstatite-Anorthite 



Am Amphoterite Chondrite 



b breccia-like • Cg Gray Chondrite 



Bu Bustite Cha Chassignite 



C Chondrite Chi Chladnite 



c spherulitic Co Orvinite 



Ccn Ngawite Db Ataxite, Babb's Mills group 



•5 Dr. Aristides Brezina, Proc. Am. Phil. Soc, Vol. 53, No. 176, pp. 211 

 to 247. 



PROC. AMER. PHIL. SOC, LIT. 211 P, PRINTED OCT. 3, I9I3. 



