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In mineralogy again, the first classifications were based upon differences in aspect, texture, and other physical attributes. Berzelius made two attempts at a classification based solely on chemical constitution. That now current, recognises as far as possible the relations between physical and chemical characters.
William Henry Pettee, Harvard, '61, assumed the work in mineralogy in 1875 under the title of Professor of Mining Engineering. In addition to his work in his own subject, he served from 1881 to 1904 as editor of the University Calendar and advisory editor of other University publications.
"Good Heavens, Mr. Slick, how can you talk such nonsense, and yet have the modesty to say you have no prejudice?" "Yes, the Spy System," said he, "and I'll prove it. You know Dr. Mc'Dougall to Nova Scotia; well, he knows all about mineralogy, and geology, and astrology, and every thing a'most, except what he ought to know, and that is dollar-ology.
When a sea-anemone multiplies by division, there is a time during which it is said to be one animal partially divided; but, after a while, it becomes two animals adherent together, and the limit between these conditions is purely arbitrary. So in mineralogy, a crystal of a definite chemical composition may have its substance replaced, particle by particle, by another chemical compound.
Up through mathematics, mechanics, mineralogy, astronomy, chemistry, even physiology, has he gone, mastering every science in turn, until he is now perhaps the most learned man in Europe. But his learning satisfies him not a whit, since the soul still eludes him, and eludes him, mark you, despite month upon month of toil in the dissecting room.
By James D. Dana, M.A., LL.D., Silliman Professor of Geology and Natural History in Yale College, Author of "A System of Mineralogy," of Reports of Wilkes's Exploring Expedition, on Geology, on Zoöphytes, and on Crustacea, etc. Philadelphia. Theodore Bliss & Co. 8vo. pp. xvi., 798. $5.00. The Old Merchants of New York. By Walter Barrett, Clerk. New York. G.W. Carleton. 12mo. pp. 472. $1.50.
Now, a year or so ago, I had occupied my leisure in taking a London science degree, so that I have a smattering of physics and mineralogy. The thing was not unlike an uncut diamond of the darker sort, though far too large, being almost as big as the top of my thumb. I took it, and saw it had the form of a regular octahedron, with the curved faces peculiar to the most precious of minerals.
This is a valuable work respecting the mineralogy and geology, and especially the Giant's Causeway. Campbell's Philosophical Survey of the South of Ireland, 1777. 8vo. Arthur Young's Tour in Ireland, 1776-79. 2 vols. 8vo. An admirable picture of the agriculture and general state of Ireland at this period. Cooper's Letters on the Irish Nation, 1800. 8vo.
Some acquaintance with mechanical drawing is also desirable but not absolutely necessary. Other courses which are extremely desirable, if not altogether essential, are mineralogy, meteorology, mechanics, physical geography, organic chemistry, and possibly calculus, which may be of use in timber physics.
This beautiful mineral has been found in fair abundance at times in Shafts No. 1 and 2 in pockets, and seldom in place, most of it being taken from the loose stone at the mouth of the shaft, and it may generally be found on the dump. It is readily mistaken for calcite by the miners and those unskilled in mineralogy, but a drop of acid will quickly show the difference.
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