Carpenter, William Benjamin, 1813-1885, Dallinger, W. H. (William Henry), 1842-1909 · Philadelphia, Blakiston · leaf 977
920 INSECTS AND AEACKSIDA … by the crossing of the two sets of fibres, of which one overlies theother. That this appearance, however, is altogether an optical illu-sion may be easily demonstrated by carefully following the courseof any one of the fibres, which will be found to be perfectly regular. The stigmata or 1 spiracles…
Microscopy
Internet Archive · Wellesley College Library · Public Domain Mark 1.0. Free to use for anything.
