FIGURES 



Number Page 



Goldberg 



1 Radiation exposure from consumption of laverbread. Radiation 

 exposure of GI tract lower large intestine from the consumption 



of laverbread at 160 g/d. Unshaded blocks-dose-rate based on laver- 

 bread manufactured from contaminated weed only; shaded blocks- 

 dose-rate on laverbread manufactured from contaminated weed 

 diluted by the addition of clean weed. (Preston and 

 Mitchell, 1973) 4 



2 The depth profile of elemental carbon (charcoal) in a Lake Michigan 

 sediment. The ages were determined by Pb-210 geochronology 9 



c 



Cronin 



1 The Chesapeake Bay 19 



2 Chesapeake Bay region, indicating land used for residential and 

 commercial activities as of 1973 (Corps of Engineers, Baltimore 

 District, 1977) 20 



3 Chesapeake Bay region, indicating land used for residential and 

 commercial activities as projected for 2020 (Corps of Engineers, 

 Baltimore District, 1977) 21 



4 Environmental impact of domestic wastes on other uses of the Bay 

 (Ellis, 1973) 23 



Ketchum 



1 Comparison of atomic N:P ratios observed in wastewater-seawater 

 mixtures and in Phaeodactvlum tricornulum (from Goldman, 

 1976 71 



2 Proportions from different sources of carbon, nitrogen and 



phosphorus added to the New York Bight (after Mueller et al., 



1976 81 



Parker and Winters 



1 Classes of compounds found in petroleum 98 



2 Distribution of the chemical compounds of a crude oil. (From 

 John M. Hunt, Petroleum Geochemistry and Geology. W. H. 

 Freeman and Company, Copyright© 1979.) 99 



x 



