Greenhouse+for+Experiments+1904+-+?

"A greenhouse for experimenting, 20x20 feet, was placed, in 1904, in front of the horticultural laboratory, as a gift of the Lord and Burnham Company."

"About 1889 two greenhouses, since torn down, placed side by side, extending north and south, northwest of the second botanical laboratory, were built by Professor Taft- as an experiment- one heated by hot water, the other by steam, to see which method was preferable."