The Graphophone and Phonograph

Reducing the Density of Negatives by Various Agents

Electric Lighting in America

Covered Reservoirs

Ancient Covered Reservoirs

On Variable Load, Internal Friction, and Engine Speed and Work

The Relative Merits of the Various Types of Steam Boilers

The Great Lakes

Nature's Barometers

Filtration with Filters of Metallic Felt

The History of a Scientific Doctrine

On Tortoise (Chrysemys Picta) with Two Heads

The Geiser-Thingvalla Collision

Some Experiences with Birds

Statue of Buddha

A Botanical Atrocity

How Plants are Fertilized

High Meteorological Stations

Useful Engineering Books

Building Plans and Specifications