--Use
of the Arabian horse as an improver of the breed. 9760
VIII. NAVAL ENGINEERING.--Trial Trip of the Ohio.--The remarkable
results attained by the introduction of new boilers and
machinery in an American steamship. 9751
IX. PHYSIOLOGY.--Apparatus for Determining Mechanically the
Reaction Period of Hearing.--An interesting study of the time
of transmission of an impulse through the sensor and motor
nerves.--1 illustration. 9753
X. SANITATION.--A New Disinfector.--Description of a new apparatus
for disinfecting by superheated steam and air, with tabular
statement of elaborate tests made with it.--2 illustrations. 9754
Trees from a Sanitary Aspect.--By CHARLES ROBERTS, F.R.C.S.,
etc.--The sanitary value of trees considered by this eminent
sanitarian.--The uses and abuses of shade near houses. 9765
XI. TECHNOLOGY.--A New Alkali Process.--The Parnell & Simpson
process of making carbonate of soda, combining the features of
the Leblanc and ammonia methods.
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