vill CONTENTS. 
Mr. Wit11am Brunton on a Machine for Ventilating Coal Mines............++ 
Mr. A. G. Carre on the Use of Rockets in effecting a Communication with 
Stranded Vessels ......cesseesses wovenbeeeteesodnsleesees Suatdasberwacnene poconsuos = ANS 
Mr. Rosert Davison on a Desiccating Process ......+eceseseeee oddone dabedbvasdebese 
Mr. W. Greener on the Manufacture of the Finer Irons and Steels, as ap- 
plied to Gun-Barrels, Swords, and Railway Axles ......sssssseeereeeeees snsenciaae 
Mr. Georcr Heaton on the Cause and Prevention of the Oscillation of Loco- 
motive Engines on Railways .....sessseceeesseeseeensenees Seah Soetebieeewetesster seeoes 
Prof. HopeK1nson on the Strength and Elasticity of Stone and Timber........ 
Mr. H. Knieut on a Calculating Instrument...ccccsscsssseesesscssseseesesscessceees 
The Rev. J. W. M‘Gautey ona New Rotary Engine............64 sisanGusaucoseee 
Mr. A. Mizwarp on an Instrument called the ‘“‘ Upton Draining Tool,” as 
illustrating a principle by which the resistance of Soils to Agricultural Im- 

plements may be considerably diminished ............ seeoretesseauaas cseletuseaedss | bow 
Mr. James NasmyTH on an Oil Test ......ceesseceesereececeseeees deatdnateceaesteds soveee 124 
Mr. Wm. Nicuotson on Gordon’s Plan of Ventilating Coal Mines......... vets. Ue 
Mr. W. ParKINSON on a Water Meter ...cccssscsscssscseeececeeeeteenseesencs Paget's . 125 
Mr. Ricwarp Roserts on the Sheet-Metal Moulding Machine’! shtO eee revees 126 
———_____——_ on correct Sizing of Toothed Wheels and Pinions...... 127 
on the Excentric Sheet-Metal and Wire-Gauge......... 128 
Mr. J. Preorr Smiru on the Superiority of Macadamized Roads for Streets of 
large Towns........ 0, Rea si an Op CoECOnG Ve SCE aes ceeded rome sae eerie vecdes L2Q 
Mr. W. Syxes Warp on a Method of supplying the Boilers of Steam-Engines 
with Water ..... Saeaseasescoaseresshetscniuecedess eussteaweese Hescsesecenerenvers bofvcen-e Loe 
Mr. WuisHaw on Chain Pipes for Subaqueous Telegraphs ..........secseeceeeeeee 132 
on the Present State of Electro-Telegraphic Communication © 
in England, Prussia, and AMEerica.......4. cssscceesceereceaeaereneaee eee Mer ecole 
Mr. Woop on Kosman’s Patent Cistern as a Sanitary Machine.........+++ Servant 
- 118 
Page 
lll 
114 
114 
115 
. 116 
118 
118 

