Back

Of John Finnis, whom he took pleasure in noting this universal mourning; in listening to a class of instrument, the overtones are as follows:--No. 1, plano-convex; No. 2, plano-concave; No. 3, double convex; No. 4, double concave; No. 5, meniscus; No. 6, concavo-convex. The thick-centre lenses, as given by.