Dear y_man;
Follow the principal recipe in the third Link given:
- Start with a 1 molar KCl solution of enough volume to fill 3 or 4 bridges.
- Heat the KCl solution near to the boiling point and add slowly 2-3% wt/v agar and heat till a clear solution.
- Fill your bridges and let them slowly cool down. Add always solution to keep the bridge really filled during cooling down.
- Finish.
Good Luck!
ARGOS++