COXTKNTS. 



On the Imxv according to n'lic/i the Elect ra-uiugnctic PuiKcr of' 

 the Connecting Wire of the Follaic Pile is augmented by 

 Sch-ji-eigger's Multiplier. Bij L. F. Kaemtz, Phil. Doct., of 

 Halle ." 441 



Suggestions fur ?-enderitig the Labojirs of Foreign Astroiiomers 

 available in Qreat Britain 450 



Notices respecting New Booh 66, 142, 218, 300, 384, 451 

 Proceedings of Learned Societies 70, 145, 225, 304, 387, 452 

 Intelligence and Miscellaneous Articles 73, 150, 229, 307, 389, 



466 



List of Patents 79, 158, 239, 319, 399, 471 



Meteorological Tables . . . . 80, 160, 240,320, 400,472 



PLATES. 



I. Illustrative of Prof. Haiie's Communications on Electricity and on the 



Self-acting Blowpipe. 



II. and III. Mr. Brunel's new Mode of Tunnelling. 



IV. Illustrative of M. Becquerel's Experiments on the Development of 

 Electricity by Pressure. 



V. Illustrative of Mr, Barlow's Experiments on Mr. Marsh's Thernio- 



elecU-ic Ai)paratus. 

 V(. Illustrative of Mr. Gompertz's Defence of Ships and Fortifications. 

 VII. Suspension Bridges. 



