318 Scientific Intelligence. 
of 135 feet below the surface, occurs a stratum of black soil con- 
taining quantities of well pre eserved timber, with stumps of trees 
apparently in their natural position, and affording also discs like 
the macrospores of the Chicago clays, except that they are 
smaller. 
ae (2 sein Ach Sanger Neat Congress.—The meeting of the 
International Congress at hala n has been deferred a year, in 
ae F. G. Hi 399 pp. 12mo. ees 1384 ‘(once Green & 
Co.).—This volume is a companion is ‘the Treatise on Systematic 
Mineralo ogy by the same author, published some three years since 
this Journal, xxi, 506). The descriptions of species are brief, from 
the necessity of the case, but the matter is well selected and well 
arranged, so that the ordinary sndent will readily find almost all 
the information he needs. The work has many excellent features, 
not the least e saab the tar id prineed from the original blocks 
used by Brooke and Miller, thirty years ago. It is not as fully 
up to date as a might be; thus we are told of cyanite that 
the “dimensions are undetermined ;’ mention is made of 
vanadinite from Arizona, of danburite from Agena and 
These analyses are quoted here 
made by J. B. Mackiutcah upon the ph mineral. 
1, Ehrenfried- 
Was 2. Stoneham. 8. Stoneham. 
kler Winkler. Mackintosh. 
osphorus pentoxide ......- yeore 41°51 
Beryl o BiG 8°61 14°84 15°76 
Alumin 6-58 2°26 eee 
Tron  sesquiomide oe cn he LUT 1°18 ce 
Lim 34°06 33°67 33°21 
Water [6°54] 659 loss 6°72 
100°00 100°05 100° 10°00 
Kl. 1132 
Analyses 1 and 2 were made upon 39°5™™ and 101-7™™ respect: 
ively. comparison between analyses 2 and 3 shows that 
according to Winkler the Stoneham mineral contains some alumi- 
num and iron together with the lium, and also that it con- 
tains water instead of fluorine—Winkler remarks upon a doubtt ] 
fluorine reaction, but is Anelined to reg: riday we loss as water. 
350° and 7°59 at a re ea urther it is seen Ske the original 
herderite differs Poko the Stoneham miners in containing about 
half the beryllium replaced by aluminum and iron, he formula 
calculated from Winkler’s results, "if only beryllium is assumed 
