XVI CONTENTS, 
Page 
Mr. J. W. Dopps on Improvements in Iron and Steel, and their Application to 
Railteay and other purposes ves .i. iss cassxenesss svdcedeantadeieias Nv accaabves compan ee 
Mr. G. H. Frite on Macadamized Roads ....c.sccessssecevssctecseesssssssevecesesees 180 
Mr. A. S. Harr on the Effect of the Resistance of Water to an Extended Cable 180 
Mr. Joun Hartnup on Controlling the Movements of ordinary Clocks by Gal- 
vanic Currents............ Rudtincererestosasetscaeiise akwavnnenmenves cares Sei Apaqnateee wees 180 
Mr. J. J. Haves on the Mode of rendering Peat economically available as a 
Fuel, and as a Source of Illuminating Gas....... ante weeoanseeewaeeeaeeen iddiostee LSE 
Captain Leacu on the Use of Percussion Lights for preventing Collisions at 
Sea and on Railways ............ nenstes rast Bansoabet sebbEtstitone sacra sc samante ieaesese 181 
Mr. Joun Macerecor on Early Methods of Propelling Ships......... ra eeeen seoee 182 
Dr. Gray on a new Railway Signal............. Brocoeabisononccbe Gartedteacecs ee 
Mr. R. Matxzr on the Construction of the 36-inch Mortars made by order of 
Eder WEpjeoby s Overmenichy Mvadualotetecseochs Acca: cas scotedeaseenencoueeaees aeetge LOO 
Mr. Guiiprorp L. Motzesworrn on Tangent-Wheels ....... Roce ches aecamtes ren LOO 
Admiral Moorsom on the want of Facts respecting the Performance of Vessels 
BUIGEA wrccrerncaatusscscamisen ser. SCaScHancaabeeoLeeDAE aa tececccccssveccee sossueeseheddeeners: Eo 
Mr. T. Moy’s Improvements in the mode of Working Steam-Engines ......... 187 
on the Philosophy of the Wave-Line System of Ship-building... 188 
Sir J. Murray on the Laying of Submarine Telegraph Cables.........00+ noite - 188 
Mr. J. Neviix1e on the Flow of Water through Circular Pipes ...c....eecsseeeeee 189 
Mr. A. Baxestrint on the Submarine Electric Telegraph Cable.........cccceeees 189 
Mr. W. J. Macquorn Ranxrne on the Principle of the Transformation of 
StRMICHABED ighadaiie. Siscks esses sesh SAUER fave ie ae es eae eacaccassaseves LOG 
Mr. Georcer REnnie’s continuationof Experiments to determine the Resistances 
of Screw-Propellers when revolving in Water at different Depths and Velo- 
GUNES. | cesesey expenses See cceesctcecccsscscsveese en eeecnesrscccacese tas'enseeaene secvcevencesces 189 
— on the Quantity of Heat developed by Water when rapidly 
agitated ..... Shee’ eens Rese ntaccacenesndvics sasoseeneseas'e Tes wi eabedecesaccucessacteeee «- 190 
Mr. J. Scorr Russexz on the Mechanical Structure of the ‘Great Eastern’ Steam 
Php! ees Pavsauseses recess ster ceesescre anes cee Gusti sere ic cecneds snecaneets wececeeees® 195 
Mr. T. Sitver on the Importance of Regulating the Speed of Marine Engines. 198 
Mr. Brnpon B. Stoney on the Formation of the Entrances to Tidal Basins... 198 
Professor W. Taomson on Machinery for laying Submarine Telegraph Cables 199 
Mr. J. WetHerHEAD on Superheated Steam........ Fro scheme wireedaipetgs Raveabenns EOS 
APPENDIX. 
Dr. Hopexn on the proposed Ship Canal through the Isthmus of Suez......... 199 
INDEX FORT ee mee H EH EEO OOOOH OEE H EEO O OO EEE THOR OE EED EHH EES LEH ESHTEHHEHHEEHES HEDGE HERE THOSE EES 201 
le 
ee eee eee 
