I haven't the faintest idea if this is still covered by copyright, but my feeling is that it isn't. As far as I am aware, all copyrights expire after fifty years in most countries. The book is therefore certainly out of copyright, but I don't know if there are any restrictions on quoting extracts from the Thirty-nine Articles - I have never heard of any.
Last update: 26 Sept 1996. AMDG