Nevertheless, I often reflect that there is something wanting.

Do you know what my dream is?
I should like to have over in yonder corner a transparent _chapelle_.

You, perhaps, are unacquainted with a _chapelle_.

It is a framework or basket-funnel above a chimney, for facilitating the release of volatiles and pernicious vapours, and having one side of glass.

It enables the chemist to watch the process taking place within.