MINERALOGY. 155 



discovered hi North Carolina, have been the object of sev- 

 eral researches. Dr. Smith has published an extended paper 

 upon this subject. He describes and gives analyses of the 

 colurabite from Mitchell County, 1ST. C, and also that asso- 

 ciated with the Colorado amazonstone ; of the samarskite of 

 the same locality (first analyzed by Miss Ellen H. Swallow) ; 

 of a mineral he calls euxenite. He also makes two new min- 

 erals, hatchettolite and rogersite, mentioned below. He, more- 

 over, describes the fergusonite from the granite of Rockport, 

 Mass. 



Professor O. D. Allen has also published analyses of the 

 samarskite and hatchettolite, which serve to fix their chem- 

 ical character, as he gives the first determination of the 

 amount of tantalic acid in each. Professor Delafontaine 

 has investigated the samarskite, and announces that he finds 

 in it about 25 per cent, of tantalic acid, a small percentage 

 of thorium and didymium, also a little erbia, and more of the 

 earth called by him terbia. 



In connection with the above minerals, it is interesting to 

 note the discovery, by Professor Eugene A. Smith, of the 

 mineral tantalite in Alabama ; and, by Professor W. C. Kerr, 

 of several uranium minerals at the samarskite localities in 

 Mitchell County, X. C. These are uranium mica, gum mite, 

 and uraconite (uranium ochre). Further than this, another 

 new columbite, sipylite, is mentioned in the list beyond as 

 having been described by Professor Mallet from the allanite 

 locality in Virginia. 



Dr. F. A. Genth has published another memoir upon Amer- 

 ican tellurium and vanadium minerals. He describes several 

 new species coloradoite, magnolite, ferro-tellurite (mention- 

 ed below) and also describes the occurrence of native tel- 

 lurium, tellurite, hessite, and calaverite from several new 

 localities in Colorado. He mentions, too, the discovery of a 

 green mineral, allied to the vanadium silicate roscoelite, from 

 the Magnolia District, Col. 



The same author, in the second "Report of the Mineralogy 

 of Pennsylvania," publishes an analysis of the feldspar called 

 cassinite,by Dr. Lea, showing that it contains 3.7 per cent, 

 of baryta. This point is of special interest, as Des Cloizeaux 

 has also recently mentioned the occurrence of a feldspar con- 

 taining 7.3 per cent, of the same earth. 



