20 JUNE 1868, Page 23

Elementary Mensuration. By Septimus Tobay, B.A. (Macmillan.)— This is a

very compact and useful manual, very opportune at this time, when there is a strong feeling in favour of introducing the practical applications of geometry into the curriculum of education. We observe that Mr. Tebay gives his rules without any proofs, which ho leaves, we suppose, to be supplied by the teacher. But teachers are only too apt to trust in rules, and to content themselves with giving fermatas where they ought to give explanations. A. few pages would supply all that is necessary, and make this a text-book which any teacher might be glad to use.