Dry yeast от John Spottiswood

This is the yeast called for by most bread recipes. It's largely displaced the fresh yeast our grandparents used since it has a longer shelf life and is more tolerant of mishandling. To activate it, sprinkle it on water that's 105° - 115° F and wait for it to begin foaming (about five minutes). Look for it in the dairy case--it's usually sold in strips of three packages or in 4-ounce jars. Always check the expiration date to make sure it's fresh. Dry yeast can be stored at room temperature until the expiration date--or within 4 months of opening--but it lasts even longer in the refrigerator or freezer. Always bring yeast to room temperature before you use it. It's important to keep stored yeast away from air and moisture, so use the smallest container you can find and seal it well.