172x102mm buckram school binding (worn & scuffed) vii +262pp. A little light foxing, 1cm bottom corner of first 2 leaves torn off without loss of text, else remarkably clean & crisp for a schoolbook. *Very well illustrated with diagrams, tables and formulae throughout. Compiled by John Gregory and first printed Dublin 1836 (note to Trinity College copy of 3rd edition based on information from 1870 Royal Commission on primary education). Printed in Dublin by J.S. Folds, sold by R. Groombridge, London and Fraser and Co. Edinburgh. Scarce - Trinity College has 3 copies dating from 3rd edition, only one copy noted in British libraries.