As you can see the title is actually Charity and Truth: or, Catholicks not uncharitable in laying, that none are fav'd out of Catholick Communion Becaufe The Rule is not univerfal. It appears are though the F's in the title are supposed to stand in for lowercase S's. it's also rife with Olde English spellings like the word Catholicks and sav'd. A very interesting page but providing no publishing information what-so-ever.
To date a book you can also look for design details like gilded page edges or lettering, leather covers, dust jacket design, illustrations etc. to figure out which edition you possess and thus how old it is. You might be able to glean some insight into you're book's age by scanning the text for any important dates or if the book has ads in the back as some books in the early 20th century and later had.
Lastly you can look into outside sources for appropriate information about your book. Looking on bookselling websites like abebooks.com or bookfinder.com, even Amazon or eBay might get you a little information on not just your book's publication date but also it's price. Another resource includes libraries. A librarian will most likely be able to search for your book in a program called WorldCat which will show every library who has a copy of the book you're interested in. You can then contact the library and have them give you any information they have on the book.
Finally, the last resort is to contact an antiquities or book dealer for appraisal and information. They will in all likelihood charge for their services (the amount of which I have no idea). This is the route I will be using for this book. Even though, through my research, I am pretty sure this book is as old as it appears to be, I have no idea about the history, rarity, or price of a book like this. I will eventually be contacting an expert who can help me price and maybe even sell this and other apparently rare or immensely old books. So if you know anyone...
For transparencies sake I got most of my information when I googled how determine a book's age and stumbled upon a website called Emptymirrorbooks.com. I clicked through their website and it seems they have a wealth of information on book collecting, poetry, literature and more. So hop on over there (when you're all done reading this blog of course).