The Pleistocene Man of Vero, Florida
A Summary of the Evidence of Man's Antiquity in the New World
Features
Some Reactions of Acetylene
Tanning
Tree Planting to Control Snow and Wind
Protection for the Farmer and the Railroad
The Present Position of Metamorphism
A New British Oil Industry
Cost of Producing Calcium Carbide
Problems of Atomic Structure—V
Differences Characteristic of Different Elements, and Mechanism of the Molecule
The Hadfield Prize
For a New Method of Determining the Hardness of Metals
Magnesite
Gathering Kauri Gum in New Zealand
A Little Known but Important Industry
Vitamines in War-Time Diets
Mineral Wealth of Alsace-Lorraine
Long Range Artillery Calculation
Mineral Riches of the Far East
Proper Storage Conditions for Potatoes
A Miracle Explained
Remarks on the Temperature of Space
The Pyranometer
An Instrument for Measuring Sky Radiation
Detecting Organic Impurities in Sands
The Electroculture of Crops
A Review of Important Experiments in Plant Physiology
