: 80 Scientific Intelligence. 
i e Genesis of the Ores of Iron, by J. S. NEwserry. 
(From the School of Mines Quarterly for Nov: , 1880).—Iron-ore 
ere including those of the Archean, are shown by Dr. New- 
berry to be of sedimentary he and their formation through the 
Speaki 
ores, he says: ‘‘ That in some cases the ore has been profoundly 
modified, both a character and position, since its deposition, is 
unde niable ; but to be asked to believe that the ore sheets are 
“sania is a est strain upon my credulity than it can en- 
ure 
The magnetite and hematite ores in southern Utah, which Prof. 
Newberry was the first to describe, are situated 300 miles south of 
Salt Lake City, in what is really the of sevconae amin of the Wahsatch 
Mountains. He observes that near Iron Springs, the so-called “ Big 
Blow out” is a projecting mass of magnetite iron ore, measuring 
probably 1000 feet by " 0, rising in castellated crags 100 feet or 
more above its base. e “Blair Mine’. is a ragged black crest 
- ap parte 200 to ae feet high. The ore of the region, which 
matite, is in belts standing nearly vertical; it is often 
aa by thin layers of quartz, or jasper, and occasionally by 
“some of the ore beds are interstratified w ith the granite, and are 
certainly, like it, metamorphosed sediments,” as is well seen at the 
Blair-Mine. "rot ewberry stiles Hor no eruptive iron ore ex- 
cabanas lun des Créateurs de la Cosmologie et de la Ge 
tech: ar M. DavuBr&E. 27 . 4to. (Journal des Savants, 
ce. He also points out that Descartes attributed the forma- 
tion of mineral veins to emanations from below. 
6. Geological m wig A a . of the Southern Interior of 
British Columbia, rae A M. Dawson. Montreal, July, 1880.— 
This colored map, about 21 ie square, shows the geological 
formations over a region directly north of the U. S. boundary 
regio 
ication wa Diya Acids to the eae ee of Min- 
7. 
penal were aper ; by ARRINGTON Boxron, Ph.D.—This 
Ze per for continuation of those already eibuabed by Prof. 
olton eon this subject. It gives the results obtained by sub- 
a eae Soe 
