IV. DOMESTIC ECONOMY.--Errors in Our Food Economy.--A very
practical paper on scientific nutrition. 17288
V. GEOGRAPHY.--Zanzibar.--An account of the country and the
recent events there.--3 illustrations. 17287
VI. MATHEMATICS.--Goodman's Hatchet Planimeters.--Instrument
for measuring areas and mean altitudes or irregular
figures.--5 illustrations. 17293
VII. METALLURGY.--The Great Krupp Works.--Notes on the great
iron and steel works of the German empire, with
statistics. 17302
VIII. MINERALOGY.--Precious Stoned--By Prof. HENRY A.
MIERS.--Lecture I.--First installment of a most
interesting article on the minerals used in the jeweler's
art.--3 illustrations. 17298
IX. MINING ENGINEERING.--Firedamp Testing Station at
Marchienne-au-Pont.--An elaborate experimental station
for investigation into firedamp.--3 illustrations. 17297
X. MISCELLANEOUS.--Device for the Display of Lantern
Slides.--An apparatus for the display of lantern slides
in the shop window.--A rotating carrier.--2
illustrations. 17295
What the Sea Has Taken.--Destruction of great areas of
country in the past, with special reference to the Dutch
coast. 17289