INDEX 
381 
Gravitation 175 
Gravitation, Theory of 276 
Greenbrier Limestone, Giles County, Va 355 
Guelph Formation of Ohio, Straparollus paveyi 115 
Gynandromorphs and Mosaics 18 
Hermaphroditism 19 
Hinton Formation, Giles County, Va 357 
Holochoanitic Cephalopods of Canadian Strata 197 
Hormotoma centervillensis 81 
trilineata 79 
Hubbard, George D. and Croneis, Carey G. “Notes on the Geology of 
Giles County, Va.” 307 
Indefinite Percussion 29 
Iron Resources of Giles County, Va 368 
Kimberling Shale, Giles County, Va 354 
Kornhauser, Sidney I. “A Review of the Biology of Sex-Determina- 
tion” ; 1 
Leptaena centervillensis 89 
Leveilleites 60 
Light Deflections Observed at the 1919 and 1922 Eclipses 285 
Lindsey, A. W. “Some Problems of Taxonomy” 289 
“The Egg and Larva of Hesperia Juba Bdv.” 121 
“Trichoptilus Pygmaeus Wlsm and The Neuration of the Family 
Pterophoridae” 187 
Lingula cf. cuneata 51 
Liospira (?) depressum 82 
(?) sp 56 
Lophospira ehlersi 83 
bucheri 107 
(Ruedemannia?) centervillensis 84 
(Ruedemannia?) inexpectans 96 
Lower Medinan Fauna Below the Brassfield Limestone in Ohio 72 
Loxoceras 226 
Loxoceras husseyi 86 
Lyellia cf. thebesensis 106 
Maelonoceras 242 
Maelonoceras praematurum 242 
Manganese Resources of Giles County, Va 361 
Manitoulin Limestone at Credit Forks, Ontario, Fossils from the Base of 58 
Mathematical and Experimental Tests of the General Theory of 
Relativity 283 
Mather, Kirtley F. “The Meander Patterns of Rios Secure and 
Mamore, Eastern Bolivia” 22 
“The Underground Migration of Oil and Gas” 155 
Moccasin Limestone, Giles County, Va 336 
Modiolopsis orthonota creditensis 53 
Monocyrtoceras lentidilatatum 260 
