H.J. Heinz Co.
from issue: 44-4
Tomatoes should be started in hotbeds. To make the beds, select a sheltered place on the south side of a bank or erect some shelter on the north side from where the hotbed is to be made. Dig a hole about a foot deep, 8 feet wide and as long as needed; 18 feet long will give room enough to grow plants for twelve acres of Tomatoes. Use fresh stable manure; cart it out in a pile and let it lay three or four days, then work it over until it gets good and hot, then put it into the hole prepared for it, 8×18 feet, about 18 inches thick. Then place the frame, 6 x 16 feet, on the manure; that will leave one foot of manure outside of the frame; by this means the heat will be just as great at the edge of the bed as it is in the middle. Then place 4 or 5 inches of dirt on the manure and let it lie for a couple of days to allow the dirt to get warm. The sash is put on as soon as the dirt is placed. When the dirt is warm, rake it over to get it nice and fine, then sow the seed in drills which are made about 2 inches apart by a marker.