Stripes and Plaids

I was reading through one of my sewing manuals and found a great tidbit about working with stripes and plaids in skirts.  The book is “The American System of Dressmaking” from 1912.   It looks like this method will apply to 1890s to 1910s skirts. 

As a preface, most skirts of this period are cut with the front of the gore on the straight of grain, or close to.  The back edge of the gores are then on the bias.  But this makes striped and plaids a bit awkward to deal with.   When using stripes or plaids, they recommend that you cut the gores so that the middle line of each gore is on the straight of grain, instead.