In case it hasn't already been discussed on BYC, Google Books is an excellent source for free PDF downloads of old out of print books on any subject as well as government and university reports. For example, when I first started learning about capons, I downloaded and read the following free full PDF copies from Google Books. Just click on the title below and it will take you to the Google Books page for that publication. Alternatively you can search for these titles on Google Books. Since some of the information I've seen in posts on the subject came from these books, I thought everyone already knew this.
Near the top of the page, there are reading tools including magnifiers, page display option icons, "Write a review", "Front Cover", and a gear icon. Click the drop down arrow for the gear icon and select download PDF.
Pilling, "
Directions for Caponizing", 1910
Dow, "
Capons and Caponizing", 1890
Beuoy, "
Capon Gold", 1926
Caponizing from
Tricks of the Poultry Trade 1909
Greiner, "
Capons for Profit", 1903
Here are some more.
The website "
http://www.azurehenfruit.com/html/capons_and_caponizing.html" has interesting historical information in a nice presentation with full PDF downloads of some materials. Here are a couple from this site.
Beuoy, "
Capons Up To Date", 1940
Ontario Ministry of Agriculture and Food, "
Capons", July 1978
And some more.
Sirri, "
Influence of partial and complete caponization on chicken meat quality." (see "Full Text (PDF) Free" link on the right hand side)
Rikimaru, "
An efficient method of early caponization in slow-growing meat-type chickens"
University of Florida, "
Capon", 2000
There are others, just spend a few minutes with Google.