Camera

A camera is a device that records images. These images may be still photographs or moving images such as videos or movies. In 1826, the world’s first successful photograph was taken with a wooden box camera and called “View from the Window at Le Gras”. It was produced by a process called “heliography” or sun drawing in which a pewter plate is coated with a light sensitive substance of asphaltum. The wooden box camera has evolved considerably over time and lead to the birth of film. Film advanced the camera even further but also allowed the movie camera to develop from an expensive toy to a practical commercial tool. The arrival of the digital camera foregoes film altogether and saves photographs on digital memory cards or internal storage instead. What intrigues me most about the camera is that it allows one to capture and preserve time. The idea of preserving time is unique to the camera and contributes to the reflection of human life. The camera and what it produces can affect and I argue does affect humanity. The images it produces can have a great impact on shaping people's opinions or attitudes towards world events and special interest causes.

Pressure-treated Wood

Over 70 years ago, Dr. Karl Wolman invented the process of infusing preservative deeply into wood products. Today, a giant industry has grown up around his quest to invent a wood that doesn’t rot, is insect resistant and can last a lifetime. Treated wood is used for decks, mailbox and light posts, telephone utility poles, swing sets, picnic tables, landscape ties, underwater dock pilings, oceanside boardwalks, basements, and residential building foundations. A durable structure can be built from either metal or wood. In almost all cases metal construction means steel construction and has significant cost disadvantages. You can build a wood-framed house for 25% less than a steel-framed house. You can also build a wood-frame house with ordinary labor, less need for heavy equipment, fewer code requirements, fewer building department inspections, and without having to hire on-site deputy inspectors to overlook on-site welding.

Call 911 Emergency

With the inventions of both the telegraph and telephone systems, emergency communication became a very important part of these systems. 41 years ago the single nationwide emergency number 911 was invented. When the telephone operations set up for emergency calling systems, some major changes took place. First, the telephone system equipment needed to provide the means to hold the originating calling line so the call could be checked should the calling party hang up or be disconnected and be able to call that party back. Second, there needed to be equipment changes to the public telephones that required a standard method of operation throughout the country. The public telephones had to provide dial-tone first. Telephones that required a coin deposit before the call originator would hear dial tone had to he changed to provide dial-tone-first. The public telephones had to be coin-free when dialing service codes and emergency service dispatch. These changes were a major hardship to operating telephone companies. Each of these changes involved much development and the need for new methods of handling public telephones and emergency call handling.