Carbon Forests (p. 32) 
For a discussion of how excess at- 
mospheric CO, may cause major cli- 
matic changes, see W.S. Broecker’s 
“The Hazards of Coal Dependence” 
( Natural History , October 1977, pp. 
8-19). In “The Biota and the World 
Carbon Budget” ( Science , vol. 199, 
pp. 141-45), G.M. Woodwell et al. 
review the role of the terrestrial biota 
in the world carbon budget and con- 
clude that the biota is not a sink for 
CO* but may be a source as large 
as, or larger than, the fossil-fuel 
source. Detailed methodology for re- 
constructing land-use history and 
changes in biomass and carbon is in- 
cluded in “Carbon Budget of the 
Southeastern U.S. Biota: Analysis of 
Historical Change in Trend from 
Source to Sink,” by H.R. Delcourt 
and W.F. Harris ( Science , vol. 210, 
pp. 321-23). “Fate of Fossil Fuel Car- 
bon Dioxide and the Global Carbon 
Budget,” by W.S. Broecker et al. (Sci- 
ence, vol. 206, pp. 409-18), evaluates 
various assumptions and models used 
to estimate the global carbon budget 
for the last twenty years and states 
that there is no compelling evidence 
establishing that the terrestrial bio- 
mass has decreased at a rate com- 
parable to that of fossil-fuel combus- 
tion over the last two decades. G.M. 
Woodwell’s “The Carbon Dioxide 
Question” (Scientific American, Jan- 
uary 1978, pp. 34-43) examines the 
upward trend of CO* in the atmos- 
phere caused by fossil-fuel combustion 
and forest destruction and speculates 
whether forests and oceans can store 
enough carbon to avert a major change 
in world climate. R. Allen’s “The Im- 
pact of CO* on World Carbon” (En- 
vironment, December 1980, p. 6) 
warns that if present trends continue, 
a doubling of atmospheric carbon 
could occur sometime in the middle 
of the next century, raising average 
world temperature and initiating rap- 
id, traumatic physical and biological 
changes. 
Hausa Children (p. 44) 
The daughter of a Hausa farmer 
and an Arabic teacher, Baba, a Mus- 
lim Hausa woman, agreed to dictate 
her autobiography to her friend M.F. 
Smith, wife of a social anthropologist 
studying in Nigeria. Baba’s recollec- 
tions, from the days before the British 
occupation up to the late 1940s, are 
recorded in Baba of Karo (London: 
Faber and Faber, 1954). N. Skinner’s 
Hausa Tales and Traditions (London: 
Frank Cass and Co., 1969), the first 
of a three-volume compilation of 
Hausa folklore, history, and miscel- 
lania, is devoted to folklore. Compar- 
ing the religious and political sectors 
in Kano and tracing attitudes toward 
authority and community, J.N. Pa- 
den’s Religion and Political Culture 
in Kano (Berkeley: University of Cali- 
fornia Press, 1973) argues that Kano’s 
political culture has been deeply in- 
fluenced by religious values and struc- 
ture. W. Adamu provides a general 
summation of Hausa history in The 
Hausa Factor in West African His- 
tory (Zaria: Ahmadu Bello University 
Press and Oxford University Press, 
1978). P. Hill delineates the socio- 
economic framework of a small Hausa 
village in Rural Hausa (Cambridge: 
Cambridge University Press, 1972). 
In the more recent Population, Pros- 
perity and Poverty (Cambridge: Cam- 
bridge University Press, 1977), in a 
sense a companion volume to Rural 
Hausa, Hill reports on her fieldwork 
in an exceedingly densely populated 
locality of rural Hausaland, Dorayu, 
contrasting this area with the much 
less populated village of her previous 
study. Both books contain historical 
information and descriptions of Hausa 
life style. An analysis of how sex and 
age affect work, property rights, pow- 
er, and order in different ethnographic 
contexts. Sex and Age as Principles 
of Social Differentiation, edited by 
J.S. La Fontaine (New York: Aca- 
demic Press, 1979), includes E. 
Schildkrout’s “Age and Gender in 
Hausa Society: Socio-Economic Roles 
of Children in Urban Kano” (pp. 1 09— 
82 
