"Most trees in our countries undergo a period of rest, during which all growth appears to be suspended. Branches do not enlarge and the buds on them remain as they are. They do not arouse from their torpor until spring, first, because they then find the conditions necessary for their development, and again, because, during the period of rest, chemical changes have taken place in them. These are indispensable, because if they did not occur, the trees, even in the most favorable conditions, would not open their buds. For example, plant branches that have quite recently dropped their leaves, in a warm greenhouse. They will not bud; but make the same experiment at the end of several months and the buds will appear.
"There are several ways of shortening this period of rest, some of which are rather odd. The best known is the process of etherification, which has been so much discussed recently, and which consists in placing the plants to be forced in the vapor of ether or chloroform for twenty-four to forty-eight hours. Afterwards when placed in a hothouse, the branches begin to develop almost immediately.
"A very ingenious botanist, Hans Molisch, professor in the University of Prague, has devised a method of forcing, simpler still and quite as effective. It consists in plunging the branches into warm water during a time that varies with the species. The best method is to plunge the plants in a reservoir of warm water, head downward, without moistening the roots, which would injure them. After a certain time, the plants are withdrawn, turned right side up with care, and placed in a greenhouse, where they develop at once.
"The duration of the warm bath should be nine to twelve hours at most. The best temperature is 30 degree to 35 degree [86 degree to 95 degree F] . . . That is to say, in the majority of cases, one may simply employ the water available in hothouses, which is just at the proper temperature. The process is thus at the disposal of all gardeners.
"It should be said that the good effects of the hot baths are confined to the parts actually immersed and do not extend to the whole plant. Thus, on the same stem we may see developing only the branches that have been treated with the bath, while the others remain torpid. This is easy to verify with the lilac or the willow.
"If Lobner is to be believed, we may substitute for the water bath one of steam. He has obtained good results with the lily of the valley. The thing is possible, but the method used by Molisch is more practical.
"How shall we explain the good effect of warm water on branches in a resting state? We are absolutely ignorant of its mechanism, as we are also in the case of etherification. But if we knew everything, science would be no longer amusing!"—Condensed, from THE LITERARY DIGEST.
There are many new uses for water: It will not be long before every truck and every commercial flower garden will have overhead irrigation. This is merely gas pipes ("seconds" rejected for blow holes or porosity are usually used) supported on posts say six feet above the ground. They are usually placed parallel about fifty feet apart, which will make four to the acre square, and have a single row of holes and a handle on each pipe, so that the spray can be turned in either direction; with a high-water pressure, often supplied by gravity, they may be farther apart with larger holes.
These not only have saved us from fear of drought, but they supply the moisture in the natural manner and at the right time and increase fertility to an astonishing degree.
When you take a shower bath yourself, that is overhead irrigation.