"Stable Equilibrium Is Death": Henry Adams, Sir Charles Lyell, and the Paradox of Progress

1992 ◽  
Vol 65 (4) ◽  
pp. 631 ◽  
Author(s):  
Keith R. Burich
Keyword(s):  
Stable Equilibrium ◽  
Henry Adams ◽  
Charles Lyell

Microtwinning Evidence For The Apparent Five-Fold Symmetry in T2(Al6Li3Cu)

1987 ◽  
Vol 45 ◽  
pp. 24-25
Author(s):  
Kenneth S. Vecchio ◽  
David B. Williams
Keyword(s):  
Stable Equilibrium ◽  
Equilibrium Phase ◽  
Convergent Beam Electron Diffraction ◽  
Icosahedral Structure ◽  
Cubic Crystals ◽  
Icosahedral Phases ◽  
Heat Treated ◽  
Zero Layer ◽  
Convergent Beam ◽  
Zr Alloy

Since the discovery in 1984 by Shechtman et al. of crystals which display apparent five-fold symmetry, extensive effort has been given to establishing a theoretical basis for the existence of icosahedral phases (eg.2.). Several other investigations have been centered on explaining these observations based on twinning of cubic crystals (eg.3.). Recently, the existence of a stable, equilibrium phase T2Al6 Li3Cu) possessing an icosahedral structure has been reported in the Al-Li-Cu system(4-6).In the present study an Al-2.6wt.%Li-l.5wt.%Cu-0.lwt.%Zr alloy was heat treated at 300°C for 100hrs. to produce large T2 precipitates. Convergent Beam Electron Diffraction (CBED) patterns were obtained from two-fold, three-fold, and apparent five-fold axes of T2 particles. Figure 1 shows the five-fold symmetric zero layer CBED pattern obtained from T2 particles.

Charles Lyell and the extraordinary publishing history of his works

Geology Today ◽  
1998 ◽  
Vol 14 (3) ◽  
pp. 113-115 ◽  
Author(s):  
Stuart A. Baldwin
Keyword(s):  
Publishing History ◽  
Charles Lyell ◽  
History Of

Darwin's two competing phylogenetic trees: marsupials as ancestors or sister taxa?

2012 ◽  
Vol 39 (2) ◽  
pp. 217-233 ◽  
Author(s):  
J. David Archibald
Keyword(s):  
Fossil Record ◽  
Evolutionary Biology ◽  
Phylogenetic Trees ◽  
Charles Darwin ◽  
The Other ◽  
Charles Lyell ◽  
Single Origin ◽  
Molecular Studies ◽  
Richard Owen ◽  
First Time

Studies of the origin and diversification of major groups of plants and animals are contentious topics in current evolutionary biology. This includes the study of the timing and relationships of the two major clades of extant mammals – marsupials and placentals. Molecular studies concerned with marsupial and placental origin and diversification can be at odds with the fossil record. Such studies are, however, not a recent phenomenon. Over 150 years ago Charles Darwin weighed two alternative views on the origin of marsupials and placentals. Less than a year after the publication of On the origin of species, Darwin outlined these in a letter to Charles Lyell dated 23 September 1860. The letter concluded with two competing phylogenetic diagrams. One showed marsupials as ancestral to both living marsupials and placentals, whereas the other showed a non-marsupial, non-placental as being ancestral to both living marsupials and placentals. These two diagrams are published here for the first time. These are the only such competing phylogenetic diagrams that Darwin is known to have produced. In addition to examining the question of mammalian origins in this letter and in other manuscript notes discussed here, Darwin confronted the broader issue as to whether major groups of animals had a single origin (monophyly) or were the result of “continuous creation” as advocated for some groups by Richard Owen. Charles Lyell had held similar views to those of Owen, but it is clear from correspondence with Darwin that he was beginning to accept the idea of monophyly of major groups.

The status of Gideon Mantell's “first” Iguanodon tooth in the Museum of New Zealand Te Papa Tongarewa

1997 ◽  
Vol 24 (3) ◽  
pp. 397-421 ◽  
Author(s):  
JOHN C. YALDWYN ◽  
GARRY J. TEE ◽  
ALAN P. MASON
Keyword(s):  
New Zealand ◽  
Charles Lyell ◽  
The Status ◽  
History Of ◽  
Gideon Mantell

A worn Iguanodon tooth from Cuckfield, Sussex, illustrated by Mantell in 1827, 1839, 1848 and 1851, was labelled by Mantell as the first tooth sent to Baron Cuvier in 1823 and acknowledged as such by Sir Charles Lyell. The labelled tooth was taken to New Zealand by Gideon's son Walter in 1859. It was deposited in a forerunner of the Museum of New Zealand, Wellington in 1865 and is still in the Museum, mounted on a card bearing annotations by both Gideon Mantell and Lyell. The history of the Gideon and Walter Mantell collection in the Museum of New Zealand is outlined, and the Iguanodon tooth and its labels are described and illustrated. This is the very tooth which Baron Cuvier first identified as a rhinoceros incisor on the evening of 28 June 1823.

R. P. Blackmur on Henry Adams

1978 ◽  
Vol 39 (2) ◽  
pp. 63
Author(s):  
MAKOWSKY
Keyword(s):  
Henry Adams

Henry Adams in Washington

2020 ◽  
Author(s):  
ORMOND SEAVEY
Keyword(s):  
Henry Adams

Exiles from Eden

1992 ◽  
Author(s):  
Mark R. Schwehn
Keyword(s):  
Higher Education ◽  
Max Weber ◽  
Moral Character ◽  
Richard Rorty ◽  
Christian Spirituality ◽  
Henry Adams ◽  
Spiritual Community ◽  
The Enlightenment ◽  
Parker Palmer ◽  
Allan Bloom

In this thoughtful and literate study, Schwehn argues that Max Weber and several of his contemporaries led higher education astray by stressing research--the making and transmitting of knowledge--at the expense of shaping moral character. Schwehn sees an urgent need for a change in orientation and calls for a "spiritually grounded education in and for thoughtfulness." The reforms he endorses would replace individualistic behavior, the "doing my own work" syndrome derived from the Enlightenment, with a communitarian ethic grounded in Judeo-Christian spirituality. Schwehn critiques philosophies of higher education he considers misguided, from Weber and Henry Adams to Derek Bok, Allan Bloom, and William G. Perry Jr. He draws out valid insights, always showing the theological underpinnings of the so-called secular thinkers. He emphasizes the importance of community, drawing on both the secular communitarian theory of Richard Rorty and that of the Christian theorist Parker Palmer. Finally, he outlines his own prescription for a classroom-centered spiritual community of scholars. Schwehn's study will interest all those concerned with higher education in America today: faculty, students, parents, alumni, administrators, trustees, and foundation officers.

Henry Adams, Traveler

1991 ◽  
Vol 64 (2) ◽  
pp. 179 ◽  
Author(s):  
William W. Stowe
Keyword(s):  
Henry Adams
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