Aberdare Boys’ Grammar School

Godfrey & Siddons Log Book

school building

Siddons Log Tables

Calculators had not arrived in the days of the grammar school. Multiplication, division and ‘raising to a power’ required the use of logarithms in all but the most simple cases. The use of ‘logs’ was introduced to pupils in second form arithmetic lessons — this was the case in the 1960s. Compared to modern calculators they were time consuming and their use required a considerable amount of care so that the correct figure was read from the columns in pages of dense printing. Although their use did allow precise computation, we spent an inordinate amount of time using them both in the classroom and when doing homework. Godfrey & Siddons’ book was not issued by the school, but some pupils preferred it, and bought copies from W.H. Smith.