I started a Welch's Concord batch according to Jack Keller's recipe. I
parted from the recipe only in that instead of going straight to the
secondary (1-gallon narrow-neck glass jug) with it, I started in a primary
(large open bowl with material cover) with plans to transfer to the
secondary after the yeast had a decent start. Good thing I did, as over the
next 2 days it produced a 1/2-inch-thick "cap" of foam that would have
surely spewed out of my secondary. Temps are 60-65 Fahrenheit. I only used
1/2 packet of yeast. I tried gently stirring this back into the must, to no
avail. I finally scooped it off. If it doesn't return I will transfer to
the secondary. Has anyone who has used this recipe seen this before?

Quixote