Seven Old Photo Chemical Formula Booklets 3rd and probably the last grouping.
I  had a  few of these on my  bookshelf  I  think this is the end of them.    Below i have note what I  think is the most important  contents.  There is more   information and discussions in the booklets.   See the photos  for more detail.  
 
Agfa Formulas  32 pages, includes a chemistry primer for photographers.  Agfa sheet film notch codes.    1938.
Book of Formulas for Eastman Papers
D-64 uses two stock solutions to produce different contrasts depending on the ratio of each and water.
D-74 olive brown tones
D-52
D-72
D-73
Processing Direct Positive Paper
Fix F-1 and F-1a,  Hypo Test HT-1
Hand stain Remover S-5.
Hardener F-20
Toner   T-1a
Nelson Gold Toner T-21
Sepia Re-developer T-7a
16 pages July 1931.
EASTMAN Photographic Papers, includes chemical formulas for  paper.  July 1936.  32 Pages
Stains on Negative and Prints, Eastman Kodak Co. 36 pages.  June 1947. Excellent, rare  booklet  that offers  detailed corrections  for chemical problems.  See photos.
Kodak Formulas and Processing
Contains a long list of formulas for many B&W   photographic applications.   The chemicals and the chemical reactions that take place are unchanged in the 70+ years.   
See the photos for the long list of formulas.
64  pages  September, 1941
Printing Color Films Developed as Black-and-White
Procedures for   Kodacolor,  Kodachrome,  and  Ektachrome Films.  Includes additional  chemical  treatment  formulas and treatments.    3 pages 1966.
Kodak Formulas for Commercial Photofinishing,
Film Developers:  DK-60a, DK-60aTR, DK-60aMR, DK-60 dilution, DK-60  High Temperature.
D-23, D-25, D-25R, D-76, D-76R, D-11 high contrast
stop bath: SB-5
Film Fixers:  F-5, F-5a, F-8,
Paper Developers:  D-72, D-52  warm  papers
Stop bath SB-5
Fixers:  F-6, Hardener F-6a,
Hypo Eliminator HE-2
Toners:  T-1a, T-7a, T-8, Gold Protective Solution GP-1, 
Hardener SH-1
Farmer’s Reducer R-4
Chromium Intensifier In-4
Stain Remover S-6
Tray Cleaner TC-3
           20 pages, December 1945.  
The photos have details and tables of contents.
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