Note 5 — XI. CULTURE MEDIA.
Reading edition
This figure is obtained by adding together 1 litre of water (meat extract), 1000 grammes; 2 per cent. agar, 20 grammes; 1 per cent. peptone, 10 grammes; 0.5 per cent. salt, 5 grammes—total 1035 grammes. Modifications of the process as to quantities or percentages will necessitate corresponding alterations in the calculated medium figure. The average weight of a measured litre of 2 per cent. agar when prepared in this way, after filtration, is 1010.5 grammes.