MINERALOGY. 551 



with the question as to the true Jitomic weight of beryllium. Peuficld 

 has made a series of careful analyses on pure specimens of beryl from 

 seven different localities, and shows by them that beryl uniformly con- 

 tains both alkalies and basic water, which earlier analysts have over- 

 looked. Thus the Hebron, Me., beryl contains nearly 3 per cent, of 

 csBsium oxide, with 1 per cent, lithia and 1.8 soda and 2.3 water. The 

 beryl from Branchville, Conn., contains 1 .5 per cent, of soda and 0.7 

 lithia, with 2.7 water, and that of Aduutschilon, Siberia, contains 0.25 

 per cent, soda and 1.1 water. The true formula of the species must, 

 therefore, take account of both alkalies and water, but additional 

 chemical work is needed to establish it thoroughly. Another point of 

 interest is the identity of the rare mineral, scovillite, from Salisbury, 

 Conn., with the even rarer rhabdophane from Cornwall. A paper by 

 Brush and Penfield (26., xxvii, 200) discusses this subject, and shows 

 that the mineral is essentially a hydrous phosphate of yttrium, erbium, 

 lanthanum, and didymium. 



A new analysis of the haydenite of Baltimore has been made by Morse 

 and Bayley {Amer. Gheni. Journ., vi., 24), which proves that the earlier 

 analysis was incorrect, and that it is, as has been assumed, identical 

 with chabazite. A hydrous sulphate of manganese and aluminum from 

 Sevier County, Tennessee, has been investigated by "W. G. Brown {lb., 

 p. 97). It is shown not to correspond exactly to any of the known sul- 

 phates, though related to the afjohnite of South Africa and bosjemanite 

 of several localities. The same chemist has analyzed the cassiterite 

 from Irish Creek, Rockbridge County, Virginia (16., p. 185). Messrs. 

 Clarke and Chatard have published {Amer. Jour. Sci., xxviii, 20) analy- 

 ses of a series of minerals from different localities, including allanite 

 from Tojisham, Me., some jade-like minerals, the material of Eskimo 

 implements collected at Point Barrow, Alaska, &c. Renard and Kle- 

 ment have a paper in the Bulletin of the Eoyal Academy of Belgium 

 (November 8, 1884) on the chemical composition of crocidolite and fibrous 

 quartz of South Africa. 



NEW MINERAL LOCALITIES IN THE UNITED STATES. 



The most interesting discovery of the past year is that of the rare 

 mineral herderite at Stoneham, Me., a locality which has already fur- 

 nished fine crystals of topaz and a number of other interesting minerals 

 (see the Report for 1883). The original herderite was described by 

 Haidinger in 1828, from a specimen from the tin mines of Ehrenfried- 

 ersdorf, in Saxony. The form was then made out fully, but the compo- 

 sition was left uncertain, there being only some blowpipe trials made, 

 according to which it was decided to be probably a fluo-phosphate of 

 aluminum and calcium. Only three or four specimens have been known 

 to exist, and from 1828 till 1884 nothing was added to our knowledge 

 of the species. Now, however, it has been found, as first described, by 



