Mathematics. Collections 5918.18 =**5029 .86 Brougham, Henry, lst. baron Brougham and Vaux. Tracts, mathematical & physical. London and Glasgow: R. Griffin &-co. 1860. 304-pp. Sm. 8°, Contents:=General Theorems; Kepler's problem; Dynamical principle, calculus of partial differ- ences, problem of three bodies; Greek geometry; Paradoxes imputed to the integral calculus; ar-=- chitecture of the cells of bees; Experiments & (Continued )