<span>"an enormous ornamental bat", because this is a humorous mental image, and
"as the atmospheric conditions demanded", because this is saying that the atmosphere and weather could make it necessary for someone to look a certain way (that's what is meant by putting on airs) rather than to actually stay dry or warm.</span>
Not enough context is given. what men? what writing?
I am sorry to answer. But can you be more specific.
With the information given, I would say it is 0.8.