I. BOTANY.—­Cocos Pynaerti.—­A new dwarf growing palm.—­1 illustration.

II.  Chemistry.—­The Application of Electrolysis to Quantitative
     Analysis.—­By Charles A. Kohn, B.Sc., Ph.D.—­Applicability of
     these methods to poison determinations.

III.  Civil engineering.—­The Kioto-Fu Canal in Japan.—­A
     Japanese canal connecting the interior of the country with the
     sea.—­3 illustrations.

     The Iron Gates of the Danube.—­An important engineering work,
     opening a channel in the Danube.—­1 illustration.

     The New German Ship Canal.—­Connection of the Baltic with
     the North Sea.—­Completion of this work.—­1 illustration.

     Transit in London, Rapid and Otherwise.—­By James A. Tilden. 
     —­A practical review of London underground railroads and their
     defects and peculiarities.

IV.  Electricity.—­An Electrostatic Safety Device.—­Apparatus
     for grounding a circuit of too high potential.—­1 illustration.

     Experiments with High Tension Alternating Currents.—­Sparking
     distance of arc formed by a potential difference of 20,000 volts.
     —­1 illustration.

     Laying a Military Field Telegraph Line,—­Recent field trials in
     laying telegraph line in England.—­3 illustrations.

     Some Experiments on the Electric Discharge in Vacuum Tubes. 
     —­By Prof.  J.J.  Thomson, M.A., F.R.S.—­Interesting experiments
     described and illustrated.—­4 illustrations.

     The Electrical Manufacture of Phosphorus.—­Note upon a new
     English works for this industry.

V. Geography.—­The Mississippi River.—­By Jacques W. Redway. 
     —­An interesting paper on the great river and its work and
     history.

VI.  Mechanical engineering.—­How to Find the Crack.—­
     Note on a point in foundry work.

     Riveted Joints in Boiler Shells.—­By William Barnet Le
     Van.—­Continuation of this practical and important paper.
     —­10 illustrations.

VII.  Medicine and Hygiene.—­Influence of Repose on the Retina. 
     —­Important researches on the physiology of the eye.

     The Relation of Bacteria to Practical Surgery.—­By John B.
     Roberts, A.M., M.D.—­A full review from the surgeon’s standpoint
     of this subject, with valuable directions for practitioners.

VIII.  Mineralogy.—­Precious and Ornamental Stones and Diamond
     Cutting.—­By George Frederick Kunz.—­An abstract
     from a recent census bulletin, giving interesting data.

IX.  Mining engineering.—­Mine Timbering.—­The square system
     of mine timbering as used in this country in the Pacific coast
     mines and now introduced into Australia.—­1 illustration.