Scientific American, Volume 213

acid Agency Allen-Bradley animals artificial heart atoms blood bone brown adipose tissue California cells chemical chlorophyll circuit Ciudad Guayana color Company CORPORATION cost density device district earth economic effect electric electron energy engineers estrus cycle experiments film fish frequency gauss growth Hewlett-Packard housing hydrogen hydroxyl ice fish illustration increase industrial infrared laboratory land light magnetic field mathematical measure melatonin ment meteorite metropolitan miles million MOIRÉ PATTERN molecules Motors National Negroes normal nuclear operation output oxygen pattern pentominoes percent phospholipids photograph photosynthesis pineal planning population possible pressure Price problem produced protein radiation region result SCIENTIFIC AMERICAN scientists segregation shows space speed superconducting superegg surface techniques telescope temperature tion tissue transistors transportation tube tumor ture University urban urban renewal waves York