The Gardeners' Monthly has shown often that hygrometri-cal conditions, and not temperature, govern the hardiness of trees. This fact, however, is but slowly recognized. Prof. Beal recently noted a good illustration at the college grounds at Lansing. He says:

" Last winter was as cold as any we have had in 20 years - 33º F. below zero - yet thrifty sprouts of Magnolia umbrella remained alive to the terminal bud. Perhaps this was owing to the fact that there was plenty of moisture in the soil, or little wind or no sunshine during the freezing period, or all of these combined, or for some other reason not yet understood. These magnolias have usually, even in mild winters, died to the snow line".