More like 'Calvert's practical notes on screw cutting : with examples, formulae on fractional, decimal, diametral, millimetre, and rifle pitches ; various tables of change wheels for 1/8, 1/4, 3/8, 1/2, and 5/8 inch pitch guide screws ; notes on screw-cutting tools, illustrated ; with tables and information useful to turners and fitters'