bulb reference line
41Monorail — For other meanings, see Monorail (disambiguation). Moscow Monorail in Russia A monorail is a rail based transportation system based on a single rail, which acts as its sole support and its guideway. The term is also used variously to describe the …
42Viscometer — A viscometer (also called viscosimeter) is an instrument used to measure the viscosity of a fluid. For liquids with viscosities which vary with flow conditions, an instrument called a rheometer is used. Viscometers only measure under one flow… …
43Timeline of historic inventions — The timeline of historic inventions is a chronological list of particularly important or significant technological inventions. Note: Dates for inventions are often controversial. Inventions are often invented by several inventors around the same… …
44Thunderstorm — Electrical storm redirects here. For other uses, see Electrical storm (disambiguation). A typical thunderstorm A thunderstorm, also known as an electrical storm, a lightning storm, thundershower or simply a storm is a form of weather… …
45Buenos Aires — This article is about the Argentine city; the name may also refer to Buenos Aires Province or the Buenos Aires Central Business District (also known as the Porteña City or port city). For other uses, see Buenos Aires (disambiguation). Buenos… …
46List of electronics topics — Alphabetization has been neglected in some parts of this article (the b section in particular). You can help by editing it. This is a list of communications, computers, electronic circuits, fiberoptics, microelectronics, medical electronics,… …
47Hourglass — For other uses, see Hourglass (disambiguation). Hourglass in a three legged stand An hourglass (sandglass, sand timer, sand clock, egg timer) measures the passage of a few minutes or an hour of time. It has two connected vertical glass bulbs… …
48Wind — For other uses, see Wind (disambiguation). Wind, from the …
49building construction — Techniques and industry involved in the assembly and erection of structures. Early humans built primarily for shelter, using simple methods. Building materials came from the land, and fabrication was dictated by the limits of the materials and… …
50Life Sciences — ▪ 2009 Introduction Zoology In 2008 several zoological studies provided new insights into how species life history traits (such as the timing of reproduction or the length of life of adult individuals) are derived in part as responses to… …
