It is my impression that, while we are reasonably fortunate in having in Canada a considerable literature in the history and law of the constitution, we have not, as yet, achieved a comparable product on the humbler level of constitutional practice and procedure. There have been notable exceptions but, in the main, this is true. It may, of course, be due to the taciturnity of those who are engaged professionally in the business of government. In any event, because of this lack I have been encouraged to attempt this mechanic's view of the mechanism of executive government in motion—in the hope that it may assist others in more scholarly endeavours.