VI. ELECTRICITY.--Effect of Chlorine on the Electro-motive Force
of a Voltaic Couple.--By D. G. GORE, F.R.S.--A very curious
investigation, disclosing the sudden change in E. M. F. produced
by a definite addition of chlorine. 10351
On a Theory Concerning the Sudden Loss of Magnetic Properties of
Iron and Nickel.--By Mr. A. TOMLINSON, B.A.--A new theory,
involving the probable rearrangement of the molecules or
"magnetic atoms" of the metals in question. 10358
The Passive State of Iron and Nickel.--Note of this curious
phenomenon. 10347
The Wimshurst Electric Machine.--Illustration of 13-1/2 inch sparks
produced by it.--1 illustration. 10352
The Application of Electricity to Lighting and Working.--By W.
H. PREECE.--Lecture I. 10350
VII. ENTOMOLOGY.--Systematic Relations of Platypsyllus as
determined by the Larva.--By Dr. C. V. RILEY.--An important
contribution to entomological science, a paper read at the
meeting of the National Academy of Science, April 20, 1888.--4
illustrations. 10356
VIII. HYGIENE.--Reducing Obesity--Note of general principles to
be applied to diet and life. {Transcriber: Omitted by publisher.}
10352
The Care of the Eyes.--By Prof. DAVID WEBSTER.--A practical and
scientific examination of how to preserve the eyesight and of
the use and abuse of this important organ of sense. 10352