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Create AccountA herbarium (Lat herba, "herb," formerly any medicinal plant) is a collection of dried specimens of plants mounted on sheets of heavy paper and stored in cabinets or bound in book form, as well as the building that houses such a collection.
Military engineers are soldiers specially trained to apply engineering science and technology to war. Their designation as "sappers" refers to their task of sapping - digging trenches.
Canada's first highways were the rivers and lakes used by Indigenous peoples, travelling by canoe in summer and following the frozen waterways in winter. (See also Birchbark Canoe; Dugout Canoe.) The water network was so practical that explorers, settlers and soldiers followed the example of the Indigenous peoples. (See also Coureurs des bois; Voyageurs.) To a greater extent than most other countries, Canada depends for its social, economic and political life on efficient communication and transportation. (See also Economy; Politics.)
Before 1900 a published "flora" was, loosely defined, a comprehensive, itemized description of the plants of a specific geographical region. Usually more than a mere list, it should have been an analytical description, discussing habitats and distribution and citing previous authorities.
Data collected in the field are considerably refined and condensed. Only a representative set including all critical information, such as the least depth over shoals, appears on the published chart. Typically, there is a scale reduction of 2-4 times from the field document to the chart.
Trans-Canada Airlines was created 10 April 1937 by Act of Parliament as a subsidiary of CANADIAN NATIONAL RAILWAYS to provide air service to all regions of Canada. TCA began with 2 passenger aircraft and a small bi-plane, which was used to survey new routes.
Samson, first locomotive in North America to burn coal and the first to run over all-iron rails. Built in New Shildon, England, it was shipped to Pictou, NS, to haul coal from the Albion Mines 9.6 km over a tramway to Dunbar Point on Pictou Harbour.
The first known Canadian glass factory or glasshouse, the Mallorytown Glass Works in Upper Canada, began operation in 1839 and closed in 1840. Glassmaking involved a large investment in raw materials, equipment and salaries.
DANNY ROSEHILL remembers well the Tuesday morning in September when he watched the terrorist attacks on New York City while the weekly sale at his cattle auction house in Olds, Alta., continued apace. "The towers were brought down, 3,000 people killed, and yet the sale went on," says Rosehill.
Linguistics is the study of language. Language accompanies almost all human activities, and is the medium for many of them.
Aquaculture is the human-controlled cultivation and harvest of freshwater and marine plants and animals. Synonyms include fish farming, fish culture, mariculture, fish breeding and ocean ranching.
Characteristics A typical satellite consists of a number of repeaters (transponders), each of which provides a large-capacity communication channel. Each transponder has a receiver tuned to a frequency range that has been allocated for uplink communication signals from Earth to the satellite.
Quasar, a point-like astronomical object which radiates over a wide spectral range. Although the name is a contraction of a "quasi-stellar radio source", these objects also emit light, x-rays and even gamma rays.
Mary Celeste was a brigantine built in 1861 at Spencer's Island, Nova Scotia, and originally named Amazon. She was wrecked off Cape Breton in 1867, salvaged, sold and in 1868 registered at New York and renamed Mary Celeste. In 1872 she was found adrift off the Azores, with no sign of her crew.
Before the multiplication of engineering disciplines in the late 19th and early 20th centuries, engineers were either military or civilian. Civilian engineers built nonmilitary structures; those in the military concentrated on FORTIFICATIONS.
For many years scientists believed that some kind of internal secretion of the pancreas was the key to preventing diabetes and controlling normal metabolism. No one could find it, until in the summer of 1921 a team at the University of Toronto began trying a new experimental approach suggested by Dr. Frederick Banting.
Strange things were happening to Philip Watts. When he woke in the morning he noticed a spray of brown markings on his pillow, which at first looked like coffee grounds. He soon realized they were caused by blood.
Fossil [Lat fossilis, "dug up"], trace of an ancient animal or plant preserved in the Earth's crust. Palaeontology is the modern, scientific study of fossils, but these curious objects have attracted attention since ancient times.
Historical IntroductionExhibitions by definition are displays shown for a limited time period, either in one location or on tour, unlike permanent or changing displays in museums.
In the early years of the mental-health movement, mental health was often defined as the absence of symptoms of mental illness. Since that time, attempts have been made to relate mental health to a concept of psychological well-being and to certain capacities of individuals, eg, the capacity to perceive reality "objectively," to be flexible in meeting new situations and to understand another's point of view. However, no clear line divides the mentally healthy from the mentally unhealthy, and in addition, the definition of mental health is relative and is dependent on cultural context. The characteristics of a mentally healthy person in one milieu may seem very different from those of a mentally healthy person in another.
