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MASSACHUSETTS INSTITUTE OF TECHNOLOGY.

438-32

TECHNOLOGY QUARTERLY.

VOLUME I.

BOSTON:

PUBLISHED BY THE STUDENTS.

1887-88.

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CONTENTS.

Action of Heat on Isobutylene, On the .
Assaying of Lead, Silver, and Gold, Notes
on.- - Part I.

.

on.- Part II. .
Beginning of the Mass. Institute of Technology,
Biological Examination of the Water Supply of ƒ William T. Sedgwick, Ph.D.
Newton, Mass.

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Correction-Factor of Galvanometer Coil when
the Needle is Displaced along the Axis
Determination of Organic Matter in Air, On the
Determination of Nitrates in Potable Waters by
the Grandval and Lajoux Process.

Discussion of the Precision of Measurements.

Discussion of the Precision of Measurements. II.

Discussion of the Precision of Measurements. III.

Efficiency of Small Electro-Motors

Efficiency of the Brush Storage Battery.

Elevated Pot-Holes near Shelburne Falls, Mass.,

Experiments Illustrating the Descent of Charge

in the Iron Blast Furnace

Experiments on the Blake Contact

Friction and Lubrication

Friction in Toothed Gearing

Funnel for Filtering Carbon, Note on

Gahnite, or Zinc-Spinel, from Rowe, Mass.
Heating and Ventilation

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PAGE.

278

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