Volume 69, Issue 1795supp
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Features
Tungsten Ores
How they are Mined in Spain
Solders for Various Metals
Reorganization of American Farming
Intensive Cultivation the Goal
Remarkable Comets
Comets other than Halley'S
The Body's Growth
Some Interesting Phases
Panama Canal Progress
Measuring Instruments of Long Ago
The Mechanical Application of Geometrical Principles
“Ilo,” A Third Universal Language
An Improvement on Esperanto
The Prophecy of Francis Bacon, 1560-1910
A Pioneer in New Fields of Intellectual Enterprise
A Profile Puppet-Show
How it can be Made and Used
New Electrical and Physical Apparatus
Ingenious Applications of New and Old Principles
The Microscope and the Scientist
Some Applications of Microscopy to Modern Science