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Raft

Once the spring timber drive reached the main rivers, the timber was assembled into rafts for transportation to the shipping port.

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Atomic Energy Control Board

The Atomic Energy Control Board (AECB) was established in 1946 under the Atomic Energy Control Act, with the declaration that nuclear energy is essential to the national interest (and therefore under the exclusive jurisdiction of the federal government).

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Bacteria

Bacteria are microscopic single-celled organisms capable of rapid growth and division.

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Automobile Racing

The earliest automobile racing took the form of speed trials and tours. In 1900 F.S. Evans set a record of 3 hrs, 20 min, driving an automobile the 60 km between Toronto and Hamilton.

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Canals and Inland Waterways

These 2 great journeys were first made just before the end of the 18th century, and by the same man. Alexander Mackenzie reached the mouth of the river which now bears his name in 1789, and was the first European to cross the North American continent (to Bella Coola) in 1793.

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Ornamentals

Ornamentals, in horticulture, include both woody and herbaceous plants used primarily as amenities.

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Talc

Talc is a mineral composed of 31.7% magnesium oxide (MgO), 63.5% silicon dioxide (SiO2) and 4.8% water. It is formed by the alteration of dolomite or ultramafic IGNEOUS rocks. A formula for pure talc would look like this: 3 dolomite + 4 quartz + 1 water = 1 talc + 3 calcite + 3 CO2.

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Pediatrics

Pediatrics is that branch of MEDICINE concerned with the child, its development, care and diseases.

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Urban Effect on Climate

Both land surface and air are altered by urbanization. Buildings change the geometric arrangement of the land surface, creating a rigid, rough system of blocks and street "canyons," especially in the centre of cities.

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Oil City

Oil City, Alberta, is the site of western Canada's first producing oil well, known previously as Original Discovery No 1, located in WATERTON LAKES NATIONAL PARK. Kutenai had used oil from seepage pools along Cameron Creek and early settlers used it to lubricate wagons.

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Grain Growers' Associations

Grain growers' associations are a group of farm organizations formed on the Prairies in the early 20th century. They developed in the wake of the Manitoba Grain Act (July 1900), which regulated railways and grain elevators in the interests of grain growers.

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Water Pollution

Water pollution occurs when discharges of energy or materials degrade the quality of water for other users, including both humans and wildlife. Pollution can affect inland waters such as lakes, rivers and groundwater, as well as coastal marine waters.

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Columbium

Columbium (Cb), or niobium, is a grey, ductile, tarnish-resistant and superconductive metal with a melting point of 2468°C. The name niobium (Nb) was officially adopted in 1951 by the International Union of Pure and Applied Chemistry, after 100 years of controversy.