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The following pages list, in summary fashion, the lectures and symposia to be given at the 1967 AAAS Meeting.
In previous and subsequent issues of Science, some of them are described in more detail, as are the research interests
of institutions where tours are offered.
1000 bladder and kidney stones mainly from Britain (going
AAAS INVITED LECTURES
back to 1770), India, Indonesia, Spain, Thailand, and Tur-
key have been examined by x-ray diffraction techniques.
Frontiers of Science: Lecture I
The results of these and other investigations are compared
26 December, evening.
Speaker: Carroll M. Williams (Bussey Professor of Biology, Harvard University).
Hormones, Genes, and Metamorphosis.
One of the larger and more intractable mysteries of
present-day biology is epitomized by the transformation
of an egg into a full-fledged organism. What we witness is
an orderly enlargement and diversification of the cellular
community according to an individual-specific construction
manual which the fertilized egg inherited from the previous
generation. By analogy to microbial systems, differential
gene repression and derepression are central to all present
theories of cytodifferentiation. Moreover, we can state with
assurance that the orderly diversification of the community
of cells is under close-up as well as overall chemical
control.
Particularly illuminating are recent investigations of the
metamorphosis of insects. Insects that metamorphose are
especially interesting subjects because in them the formative processes continue long into the postembryonic period
instead of being restricted to the period of embryonic
development, as in most other animals.
graphically, to see whether any conclusions can be drawn
about the possible causes of stones, including the possibility of kidney stone formation as an occupational
hazard. Results of a few interesting studies of gallstones
are also given,
Frontiers of Science: Lecture II
28 December, afternoon.
Speaker: Roger Revelle (Center for Population Studies,
Harvard University).
Can the Poar
Revolution?
Countries
Hans W. Singer (United Nations Industrial Development
Organization).
indications are that, by an apparently indirect mechanism,
Philadelphia).
flow of genetic information and its implementation by the
synthetic centers of the cells.
27 December, afternoon.
Speaker: Dame Kathleen Lonsdale, F.R.S. (Professor
University
College,
London,
W.C.1;
President, British Association for the Advancement of
Science).
Some Studies of Human Stones.
A general review is given of the occurrence of urinary
calculi from historical and geographical standpoints, taking
into consideration location, composition, and age distribu-
tion. Some kinds of stones are dying out in some localities,
others are on the increase, especially for certain groups
of people. The various methods of determining composition
are reviewed and comparative data given. The formation of
a nucleus can be related to various causes of crystal
growth and the reasons for subsequent development of the
stone are considered, especially where the composition of
the stone changes from time to time. Collections of nearly
8 DECEMBER 1967
27 December, evening.
Speaker: Athelstan Spilhaus (President, Franklin Institute,
The Experimental City.
George Sarton Memorial Lecture
28 December, afternoon.
Frontiers of Science: Lecture II
of Crystallography,
Scientific
William Paddock (Consultant in Tropical Agricultural
Development, Washington, D.C.).
Distinguished Lecture
these hormones play upon the chromosomes to control the
the
Panel Discussion. Athelstan Spilhaus, Chairman.
E. A. Mason (Massachusetts Institute of Technology).
The cellular events which comprise metamorphosis are
tightly coupled to endocrine signals administered by two
hormones—ecdysone and juvenile hormone—both of
which have recently been identified and synthesized. Present
Benefit from
Speaker: Cyril Stanley Smith (Institute Professor, Massachusetts Institute of Technology).
The Revival of Qualities, Corpuscles, and Phlogiston in
the Modern Science of Materials.
Views on the nature of materials will be traced from
workshop discoveries, through the forms and elemental
qualities of Greek
philosophers,
Paracelsian
principles,
Cartesian corpuscles, and phlogiston to the rigid molecular
chemistry of the nineteenth century. Some of each of
the old views seems to have been revived in today’s emphasis on properties based on the behavior of electrons
within complex structures.
Address of the Retiring President
blo
28 December, evening.
Speaker: Alfred Sherwood Romer (Alexander Agassiz
Professor Emeritus of Zoology, Harvard University).
Major Steps in Vertebrate Evolution,
1343