Algebra trigonometry

this book is written for pupils in the upper grades of grammar schools and the lower grades of high schools. The Introduction of the simple elements of Algebra into these grades will, it is thought, so stimulate the mental activity of the pupils, that the will make considerable progress in Algebra without detriment to their progress in Arithmetic, even if no more time is allowed for the two studies than is usually given to Arithmetic alone. The great danger in preparing an Algebra for very young pupils is that the author, in endeavoring to smooth the path of the learner, will sacrifice much of the educational value of the study.