IX. MECHANICAL ENGINEERING.--Hydraulic Tube Press.--An
extraordinarily powerful press for striking up tubes from flat
plates. 10345
The Distribution of Hydraulic Power in London.--A recent system
introduced in London, with description of the plant and
distribution pipes. 10344
The One Hundred and Twenty Ton Shears of the Port of Marseilles.--
An immense set of hoisting apparatus described and illustrated.--
3 illustrations. 10343
X. PHOTOGRAPHY.--Colored Photography.--Mr. J. E. MAYALL'S recent
advances in this phase of photography. 10349
XI. PHYSICS.--Scientific Apparatus at the Manchester Royal
Jubilee Exhibition.--Notes of the most interesting electrical,
photometrical, and communicating apparatus. 10348
The Spectra of Oxygen.--Interesting investigations of absorption
spectra of oxygen. 10358
XII. SURGERY.--Papillomatous Tumor of the Bladder, demonstrated
by Means of Lister's Electro-cystoscope.--By F. N. OTIS, M.D.--
An interesting instance of the use of an exploratory electric
light.--2 illustrations. 10354
Tumors of the Bladder Diagnosed by Means of the
Electro-Endoscopic Cystoscope.--By Dr. MAX NITZE.--The same
general subject in further detail, giving the German practice.--
5 illustrations. 10353
XIII. TECHNOLOGY.--Future Prospects for Gas Companies.--By Mr.
THOS. WOOD.--Fuel and oil gas and the future Utopia of improved
gas manufacturing.--The ideal gas company of after days.--A
valuable and suggestive paper. 10349