[ 226 ] 



XVI. Notices respecting New Books. 



Bulletin of the Bureau of Standards. Vol. IV. No. 4, May 1908. 

 ("Washington : Government Printing Office.) 



nPHE following are the titles of the articles appearing in this 

 -■- number: — Apparatus for Determination of the Form of a 

 Wave of Magnetic Flux, by M. Gr. Lloyd and J. V. S. Fisher. 

 Effect of Wave-form upon the Iron-losses in Transformers, by 

 M. Gr. Lloyd. The Luminous Properties of Electrically Con- 

 ducting Helium Gas, by P. Gr. Nutting. Function of a Periodic 

 Variable given by the steady reading of an Instrument, with a 

 Note on the use of the Capillary Electrometer with Alternating 

 Voltages, by M. G-. Lloyd. Selective Radiation from the Nernst 

 Glower, by W. W. Coblentz. The Testing of Glass Volumetric 

 Apparatus, by N. S. Osborne and B. H. Veazey. 



XVII. Proceedings of Learned Societies. 



GEOLOGICAL SOCIETY. 



[Continued from Vol. xvi. p. 882.] 



June 3rd, 1908.— Prof. W. J. Sollas, Sc.D., LL.D., F.R.S., 



President, in the Chair. 

 ^PHE following communication was read : — 



' On the Fossiliferous Rocks of the Southern Half of the Tort- 

 worth Inlier.' By Frederick Richard Cowper Reed, M.A., F.G.S., 

 and Prof. Sidney Hugh Reynolds, M.A., F.G.S. 



This paper is a continuation of that on the igneous rocks of this 

 area published in 1901 (Quart. Journ. Geol. Soc. vol. lvii. p. 267). 

 The following succession is that adopted by the authors : — 



Old Red Sandstone. 



Ludlow Rocks. Thickness in feet. 



(b. Fissile red and yellow sandstones 



with gritty and calcareous bands... ? 



i 4. Upper limestone-band about 25 



| 3. Variable non-calcareous beds, 

 xkt -o~ n „„ } according to Phillips about 500 



Wenlock Rocks. 1 % Highly-fossiliferous red clay or shale, 

 with rubbly limestone and celestine- 



bands 12 (seen) 



! 1. Lower limestone -band, somewhat 



\ sandy thickly-bedded limestone ... 30 



625 



(6. Shales with grit and highly-fossili- 

 ferous calcareous sandstone ? 



I 5. Highly-fossiliferous ashy limestone . 2^ to 3^ 



| 4. Upper trap-band about 60 



Llandoyery Rocks. ■{ 3. Sandy limestone and calcareous sand- 

 stone and grit, crowded with fossils 



about 500 



I 2. Lower trap-band ... maximum about 185 



^ 1. Micaceous sandstone, withL. Symondsi 



9 



800 to 850 



