A fume hood is a device used in chemistry laboratories to keep hazardous fumes out of the room air. Fume hoods are featured on the website Fume-Hoods.us, which explains how fume hoods work and provides examples of different types of fume hoods. The site includes links to fume hood consultants, suppliers, and manufacturers. It also includes links to general resources about fume hoods, where you can get more information about operating fume hoods and designing safe laboratories.
Macro photography is the process of photographing small items to produce large-size photographs. The Macro-Photography.us website focuses on macro photography techniques, lighting, and equipment. The website also includes a series of macro photography examples.
The role of the gunsmith was predated by early gunmakers who hand crafted early firearms that were often decorated. Many decorated handguns featured bronze or silver barrels and ornately embellished wheel-locks, with the earliest examples dating from the 1530s. Gunsmiths of the 16th and 17th centuries often entered their trade after gaining experience crafting small furniture, because Staghorn and ebony were widely used for desks and cabinets as well as the wooden stocks of firearms.
Advances in technology are changing the way we communicate, from email to audio, video, and digital interactive media. Knowledge of how to convert electronic and mechanical impulses into digitally encoded information and transmit that information over long distances has brought us a long way from the days of communicating with smoke signals. Early examples of more modern telecommunications include the morse code electric telegraph and the telephone.