The American Journal of Science and ArtsS. Converse, 1841 |
Contents
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action alumina American ammonia animal apparatus appears arsenic arsenious acid barometer battery botanical botanists carbonate carbonic acid character coal color comet common conductor containing copper deflagration deposit described diameter Dip indicated direction effect electricity examination exhibited experiments fact feet formation fossil galvanometer genera genus geological geologists Germ glass heat helix herbarium Hessian fly hundred hydrogen inches induction iron Journal Lake Champlain larvæ length lime limestone Linnæus magnetic mass matter means mercury metallic meteors miles mountains natural nearly needle nitric acid North notice observations obtained Ohio oxide paper phenomena plants plate portion potash present probably produced Prof quantity Rafinesque remarkable rocks sandstone seen shell Society soil solution species specimens stars strata strument sulphuric acid supposed surface temperature thick tion tube vapor vegetable Yale College zinc
Popular passages
Page 129 - ... 33. As the investigation of the fact mentioned above forms an important part of my paper, and is intimately connected with almost all the phenomena subsequently described in the communication I was, of course, anxious to discover the cause of so remarkable a discrepancy. There could be no doubt of the truth of my results, since a shock from a secondary current which would paralyze the arms was so much reduced by the interposition of plates of metal as scarcely to be felt through the tongue. 34....
Page 396 - Under these circumstances, we feel ourselves obliged to report that, in our opinion, a few days more of such exposure as they have already undergone, would reduce the number of the crew by sickness to such an extent as to hazard the safety of the ship and the lives of all on board.
Page 181 - Ibs. of hay, or 200 cwt. of beet-root, which are the yearly produce of such a field ; but it is less than the straw, roots, and grain of corn, which might grow on the same surface, would contain...
Page 248 - When an iron point is rubbed upon the magnet, it acquires the property of pointing to the south ; yet it always declines eastward, and is not perfectly true to the south. On this account, a thread of new cotton is taken and attached by a particle of wax as large as a mustard-seed, exactly to the middle of the iron, which is thus suspended in some place where there is no wind. The needle then points, without variation, to the south. If the needle...
Page 377 - Remarks on the Dental System of the Mastodon, with an Account of some Lower Jaws in Mr. Koch's Collection, St. Louis, Missouri, where there is a Solitary Tusk on the Right Side, by William E. Horner, MD, Professor of Anatomy in the University of Pennsylvania," reported in favour of the publication, which was directed accordingly.
Page 6 - They are both very indefatigable, ingenious men. Your system is much admired in North America." Again, "I have but lately heard from Mr. Colden. He is well, but, what is marvelous, his daughter is perhaps the first lady that has so perfectly studied your system. She deserves to be celebrated.
Page iii - Notice of a Model of the Western portion of the Schuylkill, or Southern Coal Field of Pennsylvania, in illustration of an Address to the Association of American Geologists, on the most appropriate modes for representing Geological Phenomena," (with illustrative sections).
Page 385 - Report of the progress of the Geological Survey of the State of Virginia for the year 1840.
Page 210 - Theory and Practice of Horticulture ; or, an Attempt to explain the principal Operations of Gardening upon Physiological Grounds: Being the Second Edition of the Theory of Horticulture, much enlarged ; with 98 Woodcuts.
Page 376 - Henry described an apparatus for producing a reciprocating motion by the repulsion in the consecutive parts of a conductor, through which a galvanic current is passing; and made some remarks in reference to the electro-magnetic machine invented by him in 1829, and subsequently described by Dr. Ritchie, of London. The machine referred to had been applied recently by Prof. Henry in his experiments. Mr. Fisher announced the death of Benjamin R. Morgan, a member of the Society, who died on Nov.