"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
Author(s):  
Kenneth S. Vecchio ◽  
David B. Williams

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.


2012 ◽  
Vol 39 (2) ◽  
pp. 217-233 ◽  
Author(s):  
J. David Archibald

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.


1997 ◽  
Vol 24 (3) ◽  
pp. 397-421 ◽  
Author(s):  
JOHN C. YALDWYN ◽  
GARRY J. TEE ◽  
ALAN P. MASON

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.


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

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

Author(s):  
Mark R. Schwehn

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.


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

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