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Albion Mines Railway, Pictou County, NS, was the second steam railway in Canada and the first to use a standard gauge and split-switch movable rail.

The following article is an editorial written by The Canadian Encyclopedia staff. Editorials are not usually updated.

Algoma Steel Inc. is a major steel producer based in Sault Ste. Marie, Ontario. Its principal products are steel plate and sheet for various industries, including automotive, construction and manufacturing. The company employs more than 2,900 people in Sault Ste. Marie.

The alarmingly increasing frequency of allergies, affecting over 20% of the population in developed countries, has led to the establishment of a new branch of medicine, that of allergology, which is conceptually closely related to immunology.

Aluminum is a lightweight, strong and flexible metal that resists corrosion and is 100 per cent recyclable. It is a common material in vehicles, buildings, consumer goods, packaging, power transmission and electronics. Canada’s aluminum industry began at the turn of the 20th century and grew quickly during both World Wars. Today, Canada is the world’s fourth largest producer and second largest exporter of aluminum. The country nevertheless accounts for less than 5 per cent of global production. Aside from one smelter in Kitimat, British Columbia, all Canadian plants are in the province of Quebec.

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At first, the effects are almost imperceptible: a man or woman cannot find keys or forgets the name of a loved one. As Alzheimer's disease continues to destroy nerve cells in the brain, the incidents become more frequent - and more troubling.

Frances Hodge was only 47 when Alzheimer's disease began to destroy her brain. The first symptoms appeared in 1975, when her memory began to fail. By the early 1980s, she could no longer talk, and in 1986 she entered a nursing home, where she remained until her death four months ago.

Anorexia nervosa, misnamed "anorexia" ("loss of appetite"), is a disease that has been on medical records since 1689.

Anthropology is the comparative study of past and contemporary cultures, focusing on the ways of life and customs of people around the world. Subdisciplines have developed within anthropology, owing to the amount of information collected and the wide variety of methods and techniques used in research. The main branches are physical anthropology, archaeology, linguistic anthropology, ethnology (which is also called social or cultural anthropology) and applied anthropology. In Canada, early anthropologists included missionaries, explorers and traders who documented the lives of the Indigenous people they encountered. Later, the Geological Survey of Canada played a significant role in the development of Canadian anthropology.

Antibiotic (or antimicrobial) resistance developed with the wide distribution of antibiotic medications in the 20th century. Resistance occurs when the medication is no longer capable of killing or preventing the reproduction of bacteria. A major global health challenge, antibiotic resistance makes treating diseases more difficult and expensive, and it results in fewer antibiotics that are effective in managing infectious diseases. Rates of antibiotic-resistant infections are rising in Canada. In hospital settings, infections that resist multiple drugs are also becoming more common. In 2019, an expert panel of the Council of Canadian Academies estimated that resistant infections contributed to more than 14,000 deaths in Canada the previous year. Canadian health agencies, medical professionals and industries are active in multiple efforts to combat this problem. 

Antimony (Sb) is a silvery-white, lustrous, crystalline solid. Uncharacteristically for metals, it is brittle and conducts heat and electricity poorly. Antimony melts at 630°C and boils at 1380°C. The mineral stibnite is the most important source of antimony.

Applied anthropologists use their knowledge of peoples and cultures for practical purposes. They do this framed by anthropological concepts and a methodology - ethnographic fieldwork - that portrays people in their actual circumstances.

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.

An aquarium is an organization devoted to the public exhibition of both freshwater and marine aquatic life. Exhibit species may include not only fish but also other aquatic animals.

The Archaeological Survey of Canada (ASC) was established in 1971. It is the division of the Canadian Museum of History that deals with the archaeological heritage of Canada. The major goals of the ASC are to preserve archaeological sites, research into the history of Canadian Indigenous peoples and present the results of archaeological research to the public, through publications and exhibitions. The ASC’s Mercury Series of monographs is one of the main outlets for the reporting of archaeological research in the country. Its exhibitions, both in the Canadian Museum of History and smaller ones that travel across the country, enhance public understanding of the traditions of the Indigenous peoples of Canada. (See also Archaeology.)

The archaeological record is sometimes divided into historic and prehistoric periods, depending on the availability of written sources. In Canada, the prehistoric record extends back as much as 30 000 years (see Prehistory) in unglaciated portions of the northern Yukon.

One of the most important events of this period was the creation of the Société d'archéologie préhistorique du Québec (SAPQ). It brought together a dynamic group of volunteers, moved by their desire to give Québec archaeology the highest possible standards.

Arpent, a French measure of length and area. Numerous regional variants of the arpent coexisted in 17th-century France; of these, the arpent de Paris came into use in Canada before 1636 as part of a system of measures. The arpent de superficie, or square arpent (equivalent to 0.

The word "arthritis "comes from the Greek arthron"joint" and itis "inflammation".

The Arthritis Society is the only registered nonprofit agency in Canada devoted solely to funding and promoting arthritis research, patient care and public education. The Canadian Arthritis and Rheumatism Society, as the society was called until 1977, was founded on 14 October 1947.