131 



principles of M, Pulvermacher's patent 

 portable hydro-electric chain battery, 

 and some of its effects, 52. 



Walker (Rev. Prof) on pendulum experi- 

 ments at Oxford, 19. 



Wartmann (Prof. E.) on some physical 

 properties of the solid and liquid con- 

 stituent parts of plants, 19. 



Water, on the conduction of electricity 

 through, 6 ; on air-bubbles formed in, 

 26 ; on sulphuric acid in the, of towns, 

 52. 



Water-sheds and water-basins, on the 

 systematic classification of, 89. 



Waterston (J. J.) on a general theory of 

 gases, 6. 



Watts (I. K.), notice of a snow-storm at 

 St. Ives, 41 ; account of a lunar rain- 

 bow seen Aug. 23, 1850, between Had- 

 denham and Earith, near St. Ives, ib. ; 

 on aurora borealis seen at St. Ives, 

 Hunts, Oct. 1,1850, ib. 



Waves, 21. 



Webster (W. H.) on the rise and fall of 

 the barometer, 42. 



Welsh (John) on a sliding rule for con- 

 verting the observed readings of the 

 horizontal and vertical force magneto- 

 meters into variations of magnetic dip 

 and total force, 20; description of a 

 sliding-rule for hygrometrical calcula- 

 tions, 42. 



Wherstead, near Ipswich, on the occur- 

 rence of a stratum of stones covered 

 with barnacles in the red crag at, 65. 



Whewell (Rev. Dr.) on our ignorance of 

 the tides, 27 ; a mathematical exposi- 

 tion of some doctrines of political eco- 

 nomy, 110. 



Whitney (Asa) on the best means of 

 realizing a rapid intercourse between 

 Europe and Asia, 95. 



Williams (Dv. Thomas) on the structure 

 of the branchiae and mechanism of 

 breathing in the Pholades and other 

 lamellibranchiate mollusks, 82. 



Williamson (Prof.) on the constitution of 

 salts, 54. 



Wind, on applying the power of, to a 

 pump, for the purpose of irrigation, 118. 



Wood (Searles V.) on some tubular cavi- 

 ties in the coralline crag at Sudbourne 

 and Gedgrave in Suffolk, 70. 



Wood, on the theory of the formation of, 

 72. 



Young (Robert) on the inhabitants of 

 Lower Bengal, 95. 



Zodiacal light, observations on, 24. 

 Zoology, 70, 74. 



Zoophytes, on new species of, 76 ; calca- 

 reous, found at Ipswich, 81. 



PRINTED BY TAYLOR AND FRANCIS, 

 RED HON COURT, FLEET STREET. 



