RADIUM CONTENT OF SPECIMENS. 



Lab. Name and 

 Nov Locality 



Date of 

 Discovery 



Class 



Variety 



Done 



220 

 205 



Bishopville, 

 Sumter Co., S. C. 

 Juvinas, 

 Ardiche, France. 



fell Mar. 

 15, 1843. 

 fell June 

 15, 1821. 



Stone 

 Stone 



Chladnite 

 Eukrite 



F^ 

 F 



208 



Stannern, 

 Moravia, Austria. 



fell May 



22, 1808. 



Stone 



Eukrite 



F 



204 



Mauerkirclien, 

 Upper Austria. 



fell Nov. 

 20, 1768. 



Stone 



White 

 Chondrite 



F 



209 



Mocs, 



Transylvania, Austria. 



fell Feb. 

 3, 1882. 



Stone 



White 

 Chondrite 



F 



206 



Mocs, f 

 Transylvania, Austria. 



fell Feb. 

 3, 1882. 



Stone 



White 

 Chondrite 



F 



203 



Pultusk, 

 Poland, Eussia. 



fell Jan. 

 30, 1888. 



Stone 



Gray 

 Chondrite 



F 



214 



Farmington, 

 Washington Co., Kans. 



fell June 

 25, 1890. 



Stone 



Black 

 Chondrite 



F 



217 



Mighei, Elizabethgrad, 

 S. Eussia. 



fell June 

 9, 1889. 



Stone 



Carbona- F 

 ceous Chondrite 



201 



Hessle, 



Upsala, Sweden. 



fell Jan. 

 1, 1869. 



Stone 



Spherulitic 

 Chondrite 



F 



202 



Forest City, 

 Winnebago Co., Iowa. 



fell May 

 2, 1890. 



Stone 



Spherulitic 

 Chondrite 



F 



207 



Tabory, Ochansk, 

 Perm. Eassia. 



fell Aug. 

 30, 1887. 



Stone 



Spherulitic 

 Chondrite 



F 



216 



Beaver Creek, 



W. Kootenai Dist. B. C 



fell May 

 26, 1893. 



Stone 



Crystalline 

 Spherulitic 



F 



219 



Holbrook, 



Navajo Co., Arizona. 



fell July 

 19, 1912. 



Stone 



Crystalline 

 Spherulitic 



F 



200 



Saline, 



Sheridan Co., Kans. 



fell Nov. 

 15, 1898. 



Stone 



Crystalline 

 Spherulitic 



F 



215 



Long Island, 

 Phillips Co. , Kans. 



found 

 1894. 



Stone 



Crystalline 

 Chondrite 



F 



218 



Estherville, 

 Emmet Co., Iowa. 



fell May 

 10, 1879. 



Iron- 

 Stone 



Mesosiderite 



F 



108 



Liana del Inca, 

 Atacama, Chile. 



found 



1888. 



Iron- 

 Stone 



Mesosiderite 



W 



213 



Mukerop, Gibeon, 



Gt. Namaqualand, S. A. 



found 

 1899. 



Iron 



Finest 

 Octahedrite 



F 



210 



Tonganoxie, 

 Leavenworth, Co., Kans 



found 

 1886. 



Iron 



Octahedrite 



F 



212 



Toluca, Xiquepelco, 

 Toluca, Mexico. 



found 

 1890. 



Iron 



Medium 

 Octahedrite 



F 



107 



Canon Diablo, 

 Coconino Co., Ariz. 



found 

 1891. 



Iron 



Coarse 

 Octahedrite 



W 



211 



Coahuila, State of 

 Coahuila, Mexico. 



found 

 1837. 



Iron 



Normal 

 Hexahedrite 



F 



110 



Whiskey Lake, 

 Ontario, Canada. 





Granite of Pre- 

 cambrian age. 





105 



Espanola, 

 Ontario, Canada. 





Diorite of 

 Keweenawan age. 





Wgt. of 

 sample 



8-66 



12-52 



10-71 



14-62 



6-00 



4-40 



11-33 



11-31 



12-32 



8-77 



10-62 



11-56 



14-08 



1202 



16-36 



2-66 



10-24 



14-95 



9-01 



10.42 



10 06 



10-00 



10-00 



gm 



Gms. of Ea 

 el, per gm 



sample 

 5 01 X 10-13 



2-17 



X 10- 



•41 X 10-' 



1-45 X 10 



3-12 X 10 



5-67 X 10- 



1-28 X 10-12 



7-34 X 10 



8-21 X 10- 



1-06 X 10 



•36 X 10 1 



X 10 



3-12 X 10 



5-12 X 10- 



1-33 X 10- 



3-20 X 10- 



3-9^ 



10-' 



10- 



2-13 X 10- 



7-69 X 10-'2 



3-20 X 10- 



1-22 X 10-'-^ 



How- 



* F stands for Field Museum of Natural History. 

 W stands for Ward's Natural Science Establishment. 



f The two determinations of the radioactivity of Mocs do not agree, 

 ever, the two samples were obtained from different specimens, and were not 

 ground or mixed together. The diffeience in radioactivity may be due to a 

 lack of uniformity in the distribution of radium throughout the meteorite. 



Am. Jour Sci. 

 17 



-Fourth Series, Vol. XLIV, No. 261.— September, 1917. 



