Scientific American Volume 06 Number 41 (June 1851) . pi. __ Pennsylvania Chrome the Octorara River, which separatesChester and Lancaster counties, there isWoods chrome mine, about nine miles fromNottingham, which is about 170 feet deep, 200feet long, and about 30 feet broad. This isconsidered to be the largest chrome mine inthe world; and .he researches and analyses of several chemists both of this country and Eu-rope have ascertained that it yields the bestere, being nearly purs bi-chromate of iron,93-384 is oxide of chrome. The mine hasbeen worked, about fifteen years, with a brief
Scientific American Volume 06 Number 41 (June 1851) . pi. __ Pennsylvania Chrome the Octorara River, which separatesChester and Lancaster counties, there isWoods chrome mine, about nine miles fromNottingham, which is about 170 feet deep, 200feet long, and about 30 feet broad. This isconsidered to be the largest chrome mine inthe world; and .he researches and analyses of several chemists both of this country and Eu-rope have ascertained that it yields the bestere, being nearly purs bi-chromate of iron,93-384 is oxide of chrome. The mine hasbeen worked, about fifteen years, with a briefinterruption. The site of this mine is represented as offer-ing—what, indeed, the whole region has longbeen—a rich field of interest to abounds in magnesian and chrome minerals,yielding also beautiful specimens of emerald,nickel, pennine, kammererite, marmolite, &c. The magnesian ore is found in horizontalveins in serpentine, some of which havebeen followed into the side of the hill nearly100 yardB. HOLLOW BRICKS FOR The accompanying engravirg is a sectionof one of Prince Alberts model lodging houseserected in Hyde Park, London, and the modelof which is in the Great Exhibition.—Always endeavoring to present to our readersthat which we consider new and useful, andas these houses had been spoken of in terms ofthe highest praise by some of our countrymenwho had visited them, we thought it wouldbe interesting and at the same time advanceart by presenting this view of the hollow brick is the subject of a patent bya Mr. Roberts, as noticed by us in Vol. 4 A A is apian of the window and door jambson alternate courses; C is a partition of brick;E, square jamb and chimney brick ; F is asection of a wall; D is a section of chimneybrick. The advantages derivable from the use ofhollow bricks are dryness and warmth, aswell as economy of construction—considera-tions which recommend them as a preventiveof the evils that result from the absorption
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Keywords: ., bookcentury1800, bookdecade1850, booksubjectcastiro, bookyear1851
