This section is from the book "A Treatise On Beverages or The Complete Practical Bottler", by Charles Herman Sulz. Also available from Amazon: A Treatise On Beverages.
A very practical way to clarify syrup is to make pulp out of filtering paper, as directed on page 459, and by mixing this with the syrup before filtering through the bag. The proportion of paper pulp is about five ounces to every gallon of syrup, the mass well stirred up. The syrup will turn out bright and clear.