CONTENTS. 



PAGE 



Note on' the Pulverization of "Nickel-grains" in Fuming Nitric Acid. 



By Dr W. A. Hollis . . . . ... . .253 



Note on the action of Radium rays on Mercurous Salts, By S. Skinner . 260 



On Nutrition and Sex-determination in Man. By R. C. Punnett . 262 



On some minerals from the Binnenthal, Switzerland. By R. H. Solly . 277 



Exhibition of Living Oongylus gongyloides, a floral Mantis. By Captain 



C. E. Williams. (Communicated by Mr D. Sharp) ... . 278 



Wheat Breeding. By R. H. Bifpen . . . . . . . 279 



On the Kinetic Theory of Matter. By H. C. Pocklington . . . 283 



Note on the proportion of the sexes in ' Oarcinus maenas.' By R. C. 



Punnett .- . . . . . ; . . . . . 293 



The Horse in Iceland and the Faroes. By Francis H. A. Marshall 



and Nelson Annandale. [With Plate III.] . . . . 297 



The Action of Ultra- Violet Light on Moist Air. By J. H. Vincent . 305 



Experiment to show that negative electricity is given off by a metal exposed 



to Rontgen Rays. By Prof. J. J. Thomson . . .... 312 



With this Part are issued Plates I. and II. illustrating Mr Purvis' 



paper, page 206. 



