Monday, April 30, 2007

First stamps

1847 10c, Scott #2Congress finally provided for the issuance of stamps by passing an act on March 3, 1847, and the Postmaster-General instantly let a agreement to the New York City firm of Rawdon, Wright, Hatch, and Edson. The first stamp issues of the US were offered for sale on July 1, 1847, in NYC, with Boston receiving stamps the following year and other cities subsequently. They consisted of an engraved 5-cent red brown stamp depicting Benjamin Franklin, and a 10-cent value in black with George Washington. As for all US stamps until 1857, they were imperforate. Although a number of philatelists have studied these stamps for years, much remains unknown about the facts of the original contract, design process, and the printing of these stamps.

1 cent, 1851, type IIThe post office had become so well-organized by 1851 that Congress was able to condense the common rate to three cents, necessitating a new issue of stamps. Values integrated a 1c profile of Franklin in blue, a 3c profile of Washington in red brown, a 5c portrait of Thomas Jefferson, and portraits of Washington for 10c green and 12c black values. The 1c stamp achieved disrepute, at least among philatelists, because production problems led to considerable plate modifications, and there are no less than seven major varieties, ranging in price from $100 to $200,000, and sharp-eyed collectors occasionally find the rare types going unrecognized.

Civil war
The outbreak of the American Civil War threw the postal system into turmoil. On April 13, 1861 John H. Reagan, postmaster-general of the Confederate States of America, ordered local postmasters to return their US stamps to Washington DC, while in May the Union decided to withdraw and invalidate all existing US stamps, and to issue new stamps. Associate post offices were left without genuine stamps for several months, and while many reverted to the old system of cash payment at the post office, over one hundred post offices across the South came up with their own temporary issues. Many of these are quite rare, with only single examples existing of some types. Ultimately the Confederate government issued its own stamps; see stamps and postal history of the Confederate States.

Tuesday, April 24, 2007

Blue Hen Chicken

A chicken is a type of domesticated bird which is often raised as a type of poultry. It is believed to be descended from the wild Asian Red Junglefowl.Chickens are the most common bird in the world. The population in 2003 was 24 billion, according to the Firefly Encyclopedia of Birds.
General biology and habitat
Male chickens are known as roosters (in the U.S., Canada and Australia), cockerels, or cocks. Female chickens are known as hens. Roosters can be differentiated from hens by their striking plumage, marked by long flowing tails and bright pointed feathers on their necks. Both the male and female have characteristic wattles and combs. These organs help to cool the bird by redirecting bloodflow to the skin. In males, the combs are often more prominent, though this is not the case in all varieties.
Chickens are omnivores and will feed on small seeds, herbs and leaves, grubs, insects and even small mammals like mice, if they can get them. Domestic chickens are characteristically fed commercially prepared feed that includes a protein source as well as grains. Chickens often scratch at the soil to get at adult insects and larva or seed. Incidents of cannibalism can occur when a curious bird pecks at a pre-existing wound or from over-crowding. This is exacerbated in close quarters. In commercial production this is controlled with chick "de-beaking" (removal of 2/3 of the top half and 1/3 of the lower half of the beak) and red, or very subdued lighting to make blood indistinguishable from the rest of the bird.

Blue Hen Chicken

A chicken is a type of domesticated bird which is often raised as a type of poultry. It is believed to be descended from the wild Asian Red Junglefowl.Chickens are the most common bird in the world. The population in 2003 was 24 billion, according to the Firefly Encyclopedia of Birds.
General biology and habitat
Male chickens are known as roosters (in the U.S., Canada and Australia), cockerels, or cocks. Female chickens are known as hens. Roosters can be differentiated from hens by their striking plumage, marked by long flowing tails and bright pointed feathers on their necks. Both the male and female have characteristic wattles and combs. These organs help to cool the bird by redirecting bloodflow to the skin. In males, the combs are often more prominent, though this is not the case in all varieties.
Chickens are omnivores and will feed on small seeds, herbs and leaves, grubs, insects and even small mammals like mice, if they can get them. Domestic chickens are characteristically fed commercially prepared feed that includes a protein source as well as grains. Chickens often scratch at the soil to get at adult insects and larva or seed. Incidents of cannibalism can occur when a curious bird pecks at a pre-existing wound or from over-crowding. This is exacerbated in close quarters. In commercial production this is controlled with chick "de-beaking" (removal of 2/3 of the top half and 1/3 of the lower half of the beak) and red, or very subdued lighting to make blood indistinguishable from the rest of the bird.

Wednesday, April 18, 2007

Banksia

Banksia is a genus of around 80 species in the plant family Proteaceae. They are native to Australia, occurring in all but the most arid areas. Easily recognized by their characteristic flower spikes and fruiting "cones", Banksia are a well-known Australian wildflower and a popular garden plant. They grow in forms varying from prostrate woody shrubs to trees up to 25 metres tall. They are normally known as Banksias or Australian Honeysuckle Trees.
Banksias grow as trees or woody shrubs. The largest trees, the Coast Banksia, B. integrifolia, and the River Banksia, B. seminuda, often grow over 15 metres tall, and may be up to 25 metres tall. Banksia species that grow as shrubs are typically erect, but there are some species that are prostrate, with branches that grow on or below the soil.
The leaves of Banksia vary greatly among species. Sizes vary from the narrow, 1–1½ centimetre long leaves of the Heath-leaved Banksia, B. ericifolia, to the very large leaves of the Bull Banksia, B. grandis, which may be up to 45 centimetres long. The leaves of most species have serrated edges, but a few, such as B. integrifolia, do not. Leaves are usually arranged along the branches in irregular spirals, but in some species they are crowded together in whorls.
Banksias are most without difficulty recognised by their characteristic flower spike, and the woody fruiting structures that appear after flowering. The flower spike consists of a central woody axis with a furry coating; it is usually held erect, but hangs down in a few species. This axis is enclosed in tightly-packed pairs of flowers, which are attached to the axis at right angles. A single flower spike may have over a thousand flowers.

Tuesday, April 10, 2007

"Wireless" factories and vacuum tubes

Marconi opened the world's first "wireless" factory in Hall Street, Chelmsford, England in 1898, employing around 50 people. Around 1900, Tesla opened the Wardenclyffe Tower facility and advertised services. By 1903, the tower structure neared completion. Various theories exist on how Tesla planned to achieve the goals of this wireless system. Tesla claimed that Wardenclyffe, as part of a World System of transmitters, would have permitted secure multichannel transceiving of information, universal navigation, time synchronization, and a global location system.
The next great invention was the vacuum tube detector, invented by a team of Westinghouse engineers. On Christmas Eve, 1906, Reginald Fessenden ransmitted the first radio audio broadcast in history from Brant Rock, Massachusetts. Ships at sea heard a broadcast that included Fessenden playing O Holy Night on the violin and reading a passage from the Bible. The world's first radio news program was broadcast August 31, 1920 by station 8MK in Detroit, Michigan. The world's first regular wireless broadcasts for entertainment commenced in 1922 from the Marconi Research Centre at Writtle near Chelmsford, England.

Friday, April 06, 2007

Satellite phone

A satellite telephone, satellite phone, or satphone is a mobile phone that communicates directly with orbiting communications satellites. Depending on the architecture of a particular system, coverage may include the entire Earth, or only specific regions.Satellite phone.The mobile equipment, also recognized as a terminal or earth station, varies generally. A satellite phone handset has a size and weight comparable to that of a late 1980s or early 1990s cell phone, but with a large retractable antenna. These are popular on expeditions into remote areas where terrestrial cellular service is unavailable.A fixed installation, such as used shipboard, may comprise large, rugged, rack-mounted electronics, and a steerable microwave antenna on the mast that mechanically tracks the overhead satellites.

Monday, April 02, 2007

Sand Hill Road

Sand Hill Road is a road in Menlo Park, California, prominent for the concentration of venture capital companies there. Its significance as a symbol of private equity in the United States may be compared to that of Wall Street in the stock market. Connecting El Camino Real and Interstate 280, the road provides easy access to Stanford University and Silicon Valley. For several years during the Dotcom boom of the late 1990s, commercial real-estate on Sand Hill Road was more expensive than anywhere else in the U.S. (even Manhattan).Some of the areas Sand Hill Road venture capitalists invest in:Sand Hill Road also serves as home to the Stanford Linear Accelerator.