I think so, because dogs and cats, in crunching hard bones, always close
their eyelids, and at least sometimes in sneezing; though dogs do not
do so whilst barking loudly. Mr. Sutton carefully observed for me
a young orang and chimpanzee, and he found that both always closed
their eyes in sneezing and coughing, but not whilst screaming violently.
I gave a small pinch of snuff to a monkey of the American division,
namely, a Cebus, and it closed its eyelids whilst sneezing; but not on
a subsequent occasion whilst uttering loud cries.

_Cause of the secretion of tears_.--It is an important fact which
must be considered in any theory of the secretion of tears from
the mind being affected, that whenever the muscles round the eyes
are strongly and involuntarily contracted in order to compress
the blood-vessels and thus to protect the eyes, tears are secreted,
often in sufficient abundance to roll down the cheeks.
This occurs under the most opposite emotions, and under no emotion
at all. The sole exception, and this is only a partial one,
to the existence of a relation between the involuntary and
strong contraction of these muscles and the secretion of tears
is that of young infants, who, whilst screaming violently
with their eyelids firmly closed, do not commonly weep until
they have attained the age of from two to three or four months.
Their eyes, however, become suffused with tears at a much earlier age.
It would appear, as already remarked, that the lacrymal
glands do not, from the want of practice or some other cause,
come to full functional activity at a very early period of life.
With children at a somewhat later age, crying out or wailing from
any distress is so regularly accompanied by the shedding of tears,
that weeping and crying are synonymous terms.[18]