Both Uses of

demonstrate

in

A Room of One's Own

Had it something to do with being born of the middle class, I asked; and with the fact, which Miss Emily Davies a little later was so strikingly to demonstrate, that the middle-class family in the early nineteenth century was possessed only of a single sitting-room between them?†
Chpt 4

demonstrate = show

[*2 'If, like the reporter, you believe that female novelists should only aspire to excellence by courageously acknowledging the limitations of their sex (Jane Austen [has] demonstrated how gracefully this gesture can be accomplished ....)†
Chpt 4 *

demonstrated = showed

Definitions:

(1) (demonstrate as in: It demonstrates my point.)
to show
The exact meaning of this sense of demonstrate can depend upon its context. For example:
- "I will demonstrate how to throw a Frisbee." -- show how to do something
- "I will demonstrate how much quicker the new computer is than the old one." -- show how something works
- "Her questioned demonstrated that she was listening and thinking deeply about what was said." -- showed to be true or proved
(2) (demonstrate as in: demonstrate to protest)
a public display supporting a cause -- usually joining with others in a political protest
(3) (meaning too rare to warrant focus)