The straight line in which the vertical polar plane cuts the plane of the circle of contact is called the dirigent. As there are in general two circles of contact, there are two dirigents, and they are parallel to the diretrices.
High divers Wilf Bacon, who holds the B.C. indoor crown, and Bernie McHale supplied thrilling samples of what aquatic fans will see, when the province's best boardsmen vie for honors at the Jaycee Regatta next month.
Because of the nature of the mix preportioning, and use of a superplasticizer, these concretes were able to develop high early-age strength as shown below.
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