> Here is the abstract as it appears in Bulletin 22 (1916) pp 218-219:
>...
> Gossard proves the following theorem: the three Euler lines of the
> triangles formed by the Euler line and the sides, taken by twos, of
> a given triangle, form a triangle triply perspective with the given
> triangle and having the same Euler line. The orthocenters, circum-
> centers and centroids of these two triangles are symmetrically
> placed as to the center of perspective.
This makes me think I may have been maligning Cajori - maybe
"triply perspective" means just what it says - I shall have to have
a look. If so, it seems likely that this triple-perspectivity is
Gossard's own (and maybe only?) contribution. However, the wording makes
it seem fairly likely that Gossard did independently rediscover "his"
theorem, which perhaps entitles him to be hyphenated with Zeeman and/or
Cikot.
Thank you Julio, and regards from
John Conway