Variable frequency oscillators are an essential element of many radio communication systems. One of the problems in their design is the elimination of undesirable variations in the output frequency. Present day knowledge of the causes of frequency instability in oscillators…

The mechanism of headache has been studied physiologically by the neurosurgeon, whose conclusions have sometimes proved difficult to correlate with known anatomical facts. This is because of the relative paucity of knowledge concerning intracranial sensory nerves and nerve endings so…

Note: Author’s signature redacted from title page., The percentage of D-C motors being used in industry is greater than ever before. One reason for this is that in the last twenty years the development of the electronic tube rectifier has…

This thesis comprises a group of historical and critical studies of the Canadian nature poetry which appeared in both English and French from the time of Canada’s earliest literary beginnings up to the second decade of the present century. These…

Although Labrador is the oldest discovered portion of the North American mainland it has remained isolated from the general development of the continent and, even today, knowledge of its climate and geography is still far from complete. The establishment of…

[...]Realizing the great deficiency of knowledge in this field, the Wood Chemistry Committee of the Technical Section, Canadian Pulp and Paper Association, recommended a thorough investigation of the effects of halogen-containing oxidants on wood and its constituents. This research was…

Disturbances in the function of the adrenal cortex in man are associated with several clinical syndromes. In some patients, however, the classical features known to be associated with abnormalities in adrenal function may not be apparent, in spite of the…

For many years the study of insect pathogens was not regarded as one of the duties of the entomologist. When insects became numerous and caused economic damage, they were combatted either with insecticides or by the introduction of parasitic or…

This thesis is based on the literature of Dominion and Provincial Surveys of Canada and other pertinent sources. In scope, this investigation does not include the Grenville Sub-province because of its indecisive geological relationship to the remainder of the Shield.…

Aeromycology has been largely dealt with for agricultural or medical reasons. Rust spores, smut spores and spores of many other plant pathogens have been found to exist in a viable state in all layers of our atmosphere. Many workers have…