black-glass ultraviolet lamp
51Gum bichromate — is a 19th century photographic printing process based on the light sensitivity of dichromates. It is capable of rendering painterly images from photographic negatives. Gum printing is traditionally a multi layered printing process, but… …
52Cannabis cultivation — Typical home grown organic sinsemilla bud compared to a cigarette pack. This article presents common techniques and facts regarding the cultivation of the flowering plant cannabis, primarily for the production and consumption of marijuana buds.… …
53Plasma display — A plasma display panel (PDP) is a type of flat panel display now commonly used for large TV displays (typically above 37 inch or 940 mm). Many tiny cells located between two panels of glass hold an inert mixture of noble gases. The gas in the… …
54Pencil — This article is about the handwriting instrument. For other uses, see Pencil (disambiguation). HB graphite pencils A pencil is a …
55Sewage treatment — The objective of sewage treatment is to produce a disposable effluent without causing harm to the surrounding environment, and also prevent pollution.[1] Sewage treatment, or domestic wastewater treatment, is the process of removing contaminants… …
56Mercury (element) — gold ← mercury → thallium Cd ↑ Hg ↓ Cn …
57Night vision — For other uses, see Night vision (disambiguation). Two American soldiers pictured during the 2003 Iraq War seen through an image intensifier Night vision is the ability to see in low light conditions. Whether by biological or technological means …
58eye disease — Introduction any of the diseases or disorders that affect the human eye (eye, human). This article briefly describes the more common diseases of the eye and its associated structures, the methods used in examination and diagnosis, and the… …
59Reversal film — A single slide, showing a color transparency in a plastic frame A slide projector, showing the l …
60Hydrogen — This article is about the chemistry of hydrogen. For the physics of atomic hydrogen, see Hydrogen atom. For other meanings, see Hydrogen (disambiguation). ← hydrogen → helium …
