365

The University of Minnesota
Minneapolis, Minnesota

Sept 29th 1886.

Dear Professor Bessey

My eye has just
caught a statement in your Botany p. 234 b
to this effect: [sic.] "it is only from the middle to near the
end of spring that they [the species [?] and [Spirogyra?]] can
be found in conjugation".

Spirogyra longata (probably that) is now found
for my botany class in a stone quarry on
the river side of our campus in all the
stages of conjugation. Indeed I have never
found in any season before such perfect
specimens as we have been examining
for the last two days.

Some, to me, quite rare forms of Miss
Butlers [?] the desmids also occur here.

Sincerely yours
C. W. Hall