elaborate equatorial armillary sphere

adding up problem alligator lizard balanced slide type valve coded-decimal system current reversal chronopotentiometry Folin-McEllroy-Peck's method investment company institute measuring systems noncommunistic ocurrence of coal seam one-to-one transformation PP (parallel processing) ring-seals social increase rate of population statistical inversion method strong sewage ultramicropalaeontology viscous property vote banks vox-pops