History of the World's Postal Service.--Conclusion of this
interesting article.--The service in Germany, China. Russia, and
elsewhere.--10 illustrations.
Snow Hall--The new science and natural history building of the
University of Kansas.
VII. NAVAL ENGINEERING.--Improvement in Laying Out Frames
of Vessels.--The Frame Placer.--By GUSTAVE SONNENBURG.--Ingenious
apparatus for use in ship yards.--1 illustration.
Sea-going Torpedo Boats.--The inutility of small torpedo boats
at sea.--The construction of larger ones discussed.
VIII. ORDNANCE.--Firing Trial of the 110½ Ton B.L. Elswick Gun.
Full dimensions of this piece and it projectiles.--Results of proof
firing.--9 illustrations.
IX. PHOTOGRAPHY.--Experiments in Toning Gelatino-Chloride
Paper.--Trials of ten different gold toning baths, formulas,
and results.
Printing Lantern Pictures by Artificial Light on Bromide Plates
from Various Sizes.--By A. PUMPHREY.--The processor producing
smaller or larger transparencies from negatives.--1 illustration.
X. PHYSICS.--A New Mercury Pump.--Simple air pump for high
vacua.--1 illustration.
The Laws of the Absorption of Light in Crystals.--By H.
BECQUEREL.
Varying Cylindrical Lens.--By TEMPEST ANDERSON, M.D.,
B. Sc.--Combination of two conoidal lenses.--Range of power obtained.
XI. PHYSIOLOGY.--Elimination of Poisons.--Treatment of poison
cases by establishment of a strong diuresis.
The Filtration and the Secretion Theories.--Experiments on the
action of and secretions of the kidneys.
XII. TECHNOLOGY.--Furnace for Decomposing Chloride of Magnesium.--Furnace
with rotating chamber for use by alkali manufacturers.--1
illustration.
Notes on Garment Dyeing.--The production of blacks on silk and
wool.--Formulas for mordants.
Studies in Pyrotechny.--II. Methods of Illumination.--Continuation
of this valuable treatise.--9 illustrations.
The "Sensim" Preparing Box.--New machine for treatment of
fiber.--An improvement on the ordinary gill box.--3 illustrations.
* * * * *