Feldspathic Sandstone Flagstone from Near Hudson Hope, Northern British Columbia - Potential for Sandstone Production in British Columbia
There are a number of well-established flagstone and dimension stone producers supplying the existing market in Western Canada and adjacent US states. Such products are distributed in pallets of approximately 1 cubic metre (around 2 metric tonnes) (Photos 1, 2 ), sorted by thickness and degree of processing, such as with or without sharp edges, random or square shapes, etc. The BC and Alberta products are complemented by imported stone types not available from local producers.
Building Stones of Canada's Federal Parliament Buildings
The building stones used in the Ottawa Parliament Buildings were mined from numerous quarries in Canada, United States, and several European nations.They were cut, placed and carved according to exacting procedures using the most up-to-date technology of the time. Construction of the rebuilt Centre Block, the focus of this article, was a protracted affair, interrupted by the demands of the1914-1918 Great War. Exterior stone of the Parliament Buildings has endured the ravages of weather, fire, seismic shaking and pollution. Recently, great effort and expense have been devoted to the restoration of the masonry elements of all of the buildings to ensure the continued viability of this National Historic Site.The role of the geologist, critical in the initial evaluation and selection of the building stone, was largely ignored until recently. Building restoration of late has also restored the role of the geologist, with the requirement to understand the complex reactions of the building stone to the environment and its neighbouring masonry elements, and in the quest to find suitable replacement stone. 
 
 Resume 
 
 Les pierres de construction utilisees pour les edifices du Parlement a Ottawa proviennent de nombreuses carrieres autant au Canada, aux Etats-Unis que de plusieurs pays europeens. Elles ont ete taillees, posees et sculptees suivant des procedes precis, en conformite avec les regles de l'art de l'epoque. La reconstruction de l'edifice du centre qui est le sujet du present article, a ete une affaire qui s'est etiree etant donne les priorites lors de la Grande Guerre de 1914-1918. Ces pierres de revetement des edifices du Parlement ont subi les avanies du climat, du feu, de tremblements de terre et de la pollution, et recemment, des efforts et des fonds considerables ont ete consentis pour la restauration des elements de maconnerie de tous les edifices afin d'assurer la perennite de ce site historique national. Le role determinant du geologue, lors de l'evaluation initiale et du choix des pierres, a ete largement ignore jusqu'a maintenant, mais la restauration des edifices a permis de remettre en valeur le role du geologue, parce qu'il fallait d'abord comprendre les reactions complexes des pierres de construction avec l'environnement et les autres elements de maconnerie avoisinants, afin de pouvoir trouver des pierres de remplacement convenables.
Anaesthetic aspects of bronchial fistula.
SINCE the term bronchial fistula can, from the practical point of view, be applied to any abnormal connection between the inside of the intrathoracic respiratory system and the outside, it includes a very wide assortment of cases. Fistulae vary in their acuteness and duration from a few minutes up to thirty years or more (Huizinga and Smelt, 1950), and in their consequences from the rapidly fatal to the almost insignificant. Although the anaesthetic management of these cases falls mainly within the province of those working in specialized units, any anaesthetist may be caught unawares from time to time. Quite apart from this consideration the subject is well worth discussing because of its intrinsic interest and because it has probably called for as much anaesthetic ingenuity and resourcefulness as any other subject within the specialty.