But that involves too many operations.
A shorter way, though not so simple perhaps, is as follows: L.M.T. + Reduction page 2 N.A. for time after local mean noon +
.R.A. of Greenwich mean noon ± Reduction page 2 N.A. for Lo. in T. (W+, E-) = L.S.T.
Note to Instructor:
Explain this formula by turning to page 107 N.A. and work it out by the formula L.M.T. + Lo. in T (W) = G.M.T. +
.R.A. +
.C.P. = G.S.T. - Lo. in T (W) = L.S.T. Example: