This book was disbound from a modern binding 

 because the plates were breaking at the gutter 

 margin. The text pages were washed with 

 deionized water and deacidified with magnesium 

 bicarbonate raising the pH from 4.5 to 9.0. The 

 plates were spray deacidified around the edges 

 with Bookkeeper deacidification spray raising the 

 pH from 4.0 to 8.5. The plates and text were 

 mended and guarded with wheat starch paste 

 and Japanese tissue. They were sewn on 5 linen 

 tapes with linen thread and bound in l A cloth 

 with vellum tips. 

 Richard C. Baker, Conservator. 

 St. Louis, March 1999. 



