“tes 
CONTENTS. 
Mr. J. W. Ginpart on the Laws of the Currency in Ireland, as exemplified in 
the Changes that have taken place m the amount of the Annual Circula- 
tion of Bank Notes in Ireland since the passing of the Act of 1846 ......... 
Professor Hancock. Should our Gold Standard of Value be maintained if Gold 
_ becomes depreciated in consequence of its Discovery in Australia and 
(COTO a tae Podaneiteicdctich eae ciaccigric Sct Onn On Cee CIcBICc ac ooo cGrE Sc rkga- nore anbcS 
———— Are there any impediments to the Competition of Free 
Labour with Slave Labour im the West Indies? ............ccececesseseceeteeaes 
Mr, Jamus Heywoop’s Statistics of the Revenues of the University and some 
of the Colleges of Oxford, compiled from the Report of the Oxford Uni- 

Versity COMMISSION sssiseeriseeessccsescecsencceecsenetenccrsccaeestaees aveesecsens 
Mr. Houpsn’s Notice of the Progress of the Sewed Muslin Manufacture in 
Treland.......+.0060.. Web vi6ae's sd euviaviscendone esmanaahd «Musk woh alien cslvatincadcicwnenannee 
Statistics of the Island of Portsea ....... uabanazeaas aaciicens ase ctussevsgencud essai 
Mr, Joun Locke on Excessive Emigration and its Reparative Agencies in Ireland 
Mr. Henry M‘Cormac on the Connexion of Atmospheric Impurity with Disease 
Mr. D. M‘Cuuxocu on the Statistics of the Province of Nova Scotia.........00 
Dr. A. G: Matcoum on the Sanitary State of Belfast, with Suggestions for its 
Tmprovement ...scsccccsseceveeenesecens SGaebouevedeansooaedeasrtenurbaiies duseournsne 
Mr. G. R. Portsr on the Productive Industry of Paris ...... vebevtvedabtaaveas ced 
’ Dr. Joun StRane on the Progress and Extent of Steamboat Building in theClyde 
Lieut-Colonel Syxxs on the Census and Condition of the Island of Bombay... 
Mr. W. A. Witpz’s Statistics of the Deaf and Dumb in Ireland........ vesaatoual 
A Short Account of the early Bills of Mortality at Dublin ... 


MECHANICAL SCIENCE. 
Mr. F. C. BAKEWELL on Telegraphic Communications by Land and Sea ...... 
Mr. JoHN BARKER’S Mechanical Proof of the Composition of Rotatory Forces 
Mr. James Barton on the Permanent Way of Railways ............ssceceeeneee 
on the Calculation of Strains in Lattice Girders, with practical 

deductions therefrom. ,.....ssecsccsesseees sete ee Be masstaitahictacslatea siatate cd cfala buabiata'biot? vslatetd 1 
Mr. J. F. BarEMAN on a series of Observations on the Discharge of Water 
. ‘from actual Experiment............. ApongREce nha Hoe Sises cas ccaethiWh cca cad Mateos 
Mr. Gzorce Cuarke on the Evolution of Gas in Wallsend Colliery............ 
Mr. James CooprEr’s Account of the Drainage of the Middle Level of the 
Bedford Level; with Observations on Arterial Drainage ............sseeceseeees 
Mr. Wituram FairBairn on the Mechanical Properties of Metals, as derived 
from repeated Meltings, exhibiting the maximum Point of Strength, and the 
Causes of Deterioration ..... Spopebonics A 
Ceeveeeeseeese Cee ase rere ences eesseorensseeseaeeer?d 
—_————_———— on the Tensile Strength of Unwrought Iron Plates 
at various Temperatures.......c..sesee saseceeeeeee Pawione seutocigns vediieldoneaati desiees 1 
ere Nem hulaplar Ouer.n..iccscccoveorsaciecessess “Breocncobic 
Remarks on the Mimie Rifle ............ odédcecte Race 
Mr. Roserr GARRETT on Improvements made in the Harbour of Belfast...... 
Mr. Toomas Murray GuapsTone on Malleable Iron for Beams or Girders... 
Mr. Joun Gopwin on an Improved Cast-Iron Sleeper for Railways ..........- 
M. Perreavx on a Dynamometric Machine for Measuring the Strength of 
Textile Fabrics and other Substances ........ 

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