Beutler Formula

I would like to list a famous formula by Willi Beutler from the 1930s. 

This formula by Beutler is very robust and can be used as either a single bath or a two bath (for very contrasty subjects). It shows high acutance, low grain and good contrast control. It works well with modern flat grain emulsions (Ilford Delta and Kodak T-Max) as well as all others. Make two stock solutions as follows:

Solution A
Water                 400ml
Metol                  5g
Sodium Sulfite    25g
Water to make    500ml

Solution B
Water                                   400ml
Sodium Carbonate (Anhd)   25g

*Solution B can also be made using 50g Kodalk made up to 500ml with water but there will be slightly less acutance.
• Make a working solution using 10:10:80
• Example to 400ml water add 50ml A + 50ml B 
• Developing times for Beutler:

ISO 25-50 films     process for 5-10 minutes
ISO 64-125 films         process for 7-10 minutes
ISO 400 films            process for 9-12 minutes

• All at 20 degrees centigrade
• Agitation 10 seconds every minute