VIU CONTENTS. 



Page 



Crystallized Carbonate of Potash 468 



Action of Others on various Bodies — Chloride of Boron 469 



Neutralizing the Magnetism of Watch-Works — New Achro- 

 matic Telescope, by M. Cauchoix — Chloride of Arsenic — 



note respecting Mr. Babbage's Logarithms 470 



Silica in Springs is dissolved by means of Carbonic Acid — 



Notice regarding the common Star- Fish Asterias rubens .. . 471 

 Sugar of Melons — Failure of the Suspension Bridge at Paris — 

 Living Condor at Paris — Scientific Books — New Patents. . 473 



Meteorological Observations 474 



by Mr. Howard near London, 



Mr. Giddy at Penzance, Dr. Burney at Gosport, and Mr. 



Veall tit Boston 477 



Index 478 



PLATES. 



I. An Engraving of Mr. Phillip Taylor's Horizontal Pumping Engine 



erected on the Mine of Moran, in Mexico. 



II. and III. Geological Sections of Norfolk and Suffolk, illustrative cf 



Mr. R. C. Taylor's Paper on the Geology of East Norfolk, 



ERRATUM. 



Page 260, for 200,000, read 206265 ; the number by which the length of 

 a division on the scale of a level answering to 1" must be multiplied to 

 obtain the length of the radius of its curvature. 



