688 



GENERAL INDEX. 



Reports of officers, annual .. 32, GO 



69, 82, 104, 128 



Reproduction of Graptolites ... 560 



Retiolites, genus 566 



" venosus 5^^ 



Rhinopora venosa 604 



Rhizograptus, genus 580 



" bulbosus 580 



Ruellia tuberosa 79, 81 



Salisburia adianti folia 125 



Sand-bars, formation of 40 



Semasia helianthana 319 



Sewage and water-supply at St. 



Louis 113 



Sleet-storm of Feb. 19-20, 1882. 72 



Spiegeleisen, analysis of 8 



Spring of 1878 14 



Springs, hot, in Colorado 71 



Steam, thermodynamic surface 



of.. 84 



Strom atopora, genus 594 



" concentrica 595 



•' hindei 602 



" osteolata 602 



Stromatoporidse, list of species. 593 



Subcutaneous pocket in man .. 87 

 Syphilis among early American 



races 21 



Temperature-constant of a mag- 

 net 6'7, 462 



Temperature in Lake Superior 

 mines 114 



Temperature of the winter of 



1877-8.. 12 

 " of December, 1877. 7 

 " of October, 1879 ••• -^2 



Temperatures — Extreme mini- 

 mum and maximum for each 



month at St. Louis 499 



Temperatures — Normal month- 

 ly 500 



Thamnograptus, genus 589 



" bartonensis . . 589 



" multiformis .. 590 



Thermodynamic surface for 



steam 84 



Todd, Albert— Memorial to . . . 117 



Tornadoes, frequency of 38 



Trapa bicornis 126 



Trees of Arkansas and Texas.. 



i;7, 76 

 Trotting-horse, final speed of. . 



5"' 515 

 Valence and atomic weight of 

 elements 652 



Valence as a measure of electro- 

 polarity 649 



Vegetation in early spring 13 



Velocity of rain-drops 15 



Vitis aestivalis 44 



" cordifolia 44 



" labrusca 44 



" riparia 44 



Vortex in air 21 



" "water 57 



Water-supply and sewage at St. 

 Louis 112 



Yucca brevifolia 12 



" draconis 12 



Zoological Affinities of Grapto- 

 lites 559 



