Linda,
That's right about the pipe. I used a bandsaw to remove about a foot long piece from the bottom of it.
This picture was taken on our farm in 1963. Early tomatoes under Hot Caps (wax paper domes) They worked, but had to be removed and replaced as the weather changed. It allowed them to be planted about 3 weeks early. The variety was rutgers if I remember correctly. The plants were staked and tied, pruned to 2 stems, and topped after the fourth bloom cluster to make the 8 clusters on each plant ripen early. Shortly after the last cluster was picked, you couldn't give tomatoes away much less sell them. Things change.