I «r|| History 
Discovery Tours 
EAST AFRICA SAFARI 
Feb. 3 to 21, 1982 
Feb. 24to March 14, 1982 
Discover the exotic world of East Africa on game 
drives with the American Museum's Curator of 
Mammals, Dr Richard G. Van Gelder. Twenty-five 
participants will visit the major wildlife reserves 
of Kenya and Tanzania. Countless zebra and wilde- 
beest, scores of elephants, giraffes and lions will 
be viewed from custom made Landcruisers. Spend 
nights under canvas in comfortable tented camps, 
as well as in luxurious lodges and hotels. For further 
information, write to: 
DISCOVERY TOURS 
American Museum of Natural History 
Central Park West at 79 St. 
New York, N Y 10024 
or call (212) 873-1440 
ology Journal, vol. 64, pp. 121-23). 
Plants 
Coevolution of Animals and Plants , 
edited by L.E. Gilbert and RH. Raven 
(Austin: University of Texas Press, 
1975), is a collection of ten papers, em- 
phasizing the importance of coevolution 
as a dynamic process. The volume at- 
tempts to cover, as broadly as possible, 
all of the ways plants interact with ani- 
mals. D.M. Gates’s “The Energy Envi- 
ronment in Which We Live” ( American 
Scientist, vol. 51, pp. 327-58) describes 
the radiant heat loads of plants and 
animals and the mechanisms for dissi- 
pating a heat load, and analyzes the 
energy budget and its diurnal tempera- 
ture cycle. RK. Kevan’s “Sun-tracking 
Solar Furnaces in High Arctic Flowers” 
(Science, vol. 189, pp. 723-26) explains 
how the flowers of two common High 
Arctic plants, which occur widely in 
arctic and alpine regions, maximize 
their small heat budgets by sun tracking 
and how insects that bask in them also 
gain heat. Arctic and Alpine Environ- 
ments, a 999-page text edited by J.D. 
Ives and R.G. Barry (London: Methuen, 
1974), provides a comprehensive sum- 
mary of our present knowledge of alpine 
and arctic environments and identifies 
the gaps in our understanding. On a 
more popular level is The Mountains, 
edited by L.J. Milne and M. Milne 
(New York: Time Inc., 1962), which has 
an informative text and many color pho- 
tographs, but contains some factual er- 
rors. Treatises on specific ecosystems 
discussed in this issue include: An Arctic 
Ecosystem: The Coastal Tundra at Bar- 
row, Alaska, edited by J. Brown et al. 
(Stroudsburg: Dowden, Hutchinson and 
Ross, 1980); Truelove Lowland, Devon 
Island, Canada: A High Arctic Ecosys- 
tem, edited by L.C. Bliss (Edmonton: 
University of Alberta Press, 1977); Geo- 
ecology of the Colorado Front Range: A 
Study of Alpine and Subalpine Environ- 
ments, edited by J.D. Ives (Boulder: 
Westview Press, 1980). See also K. 
Scherman’s Spring on an Arctic Island 
(Boston: Little, Brown and Co., 1956), 
her popular account of her expedition to 
an island north of the Arctic Circle. 
Clothing 
A. C. Guyton’s Textbook of Medical 
Physiology (Philadelphia: W.B. Saun- 
ders Co., 1976) is a standard reference 
that gives some information on the phys- 
iological problems experienced at high 
altitudes. For more information on 
clothing designed to protect from the 
cold, see L.H. Newburgh’s classic 
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