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Features

The New York Zoological Park

Report of the Board of Visitors to the Naval Observatory for the Year 1901

The Manufacture of Cyanides

Induced Radio-Activity

The Action of Electricity upon Frost

Animal Perfumes and their Origin

By R. Lydekker

Intramercurial Planet Apparatus of the Smithsonian Institution

The Utility of Alkaline Phosphatic Manures

By John Hughes

Report on the Metric System

Some Locomotive Shop Tools

Word-Blindness

Manufacturers' Importations

An Improved Bookcase

A Cat's Great Jump

The Electrical and Magnetic Properties of Iron Alloys

New Treatment of Niobite—Preparation and Properties of Cast Niobium

By M. Henri Moissan

Electric Furnaces

By Bertram Blount

Trade Notes and Recipes

First Sault Ste. Marie Canal

An Electro-Chemical Explanation of the use of Cadmium in Testing Storage Batteries

By E. C. Handy

Trade Suggestions from United States Consuls

Selected Formulæ

Patents!

Departments

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    May 10, 1902

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