| Show PLANTS UNDER GLASS opinion of an expert 1 I on n the proper night tar for plants the constantly increasing use agreen of green hou bouses ses in the cultivation of plants mak makes es a s knowledge of the best methods for their management of general imports importance nee in growing plants plant under sunder natural conditions out of doors it is well known that they undergo wide variations of te temper m per store in the changes from day to night it is not however aa as generally known knowl that euch such changes in temperature are equally necessary tor for successful plant growing in glass structures where artificial heat beat is used on this subject mr william saunders dersi superintendent of the tb gardens and grounds of the agricultural department at washington says that one of the most prevalent and injurious errors in the management of greenhouses and other plant houses is that of keeping the temperature too high during the night to maintain as high a degree of heat during daring the darkness as during the light is a practice opposed both to science and the he results of experience it is also told that plants grown in a nearly uniform temperature under glass eldom seldom ripen or mature their wood in a thorough manner are immature and make feeble growth and the aholo I 1 plant contracts a felicate jle Je licate habit of constitution ution which renders it incapable of withstanding the slightest neglect without injury on the contrary plants constantly subjected to a suitable lowering of nagi t temperature are more robust have short jointed and matured growths flowers not only expand more fully but remain longer in perfection fruits are better colored and flavored and moro more perfect in every respect than those developed in an atmosphere of uni uniform forin heat beat and moisture greenhouse plants require no beat during the night further than to exclude frosts another injury consequent upon a high night temper temperature attire during winter arisco from the extract extrac extra tm cn of moisture from the atmosphere to romain maintain an inside temperature pera ture of even 00 begs when the external is near zero In volya rapid generation of heat and as the tile capacity of air for taking moisture increases in proportion to its rise a great demand Is is i made upon the plants and everything in the house capable of giving up moisture re the quantity of water thus carried off may be seen by the deposition of ice on the inner surface of the glass after a night of severe frost ice one fourth of an inch in thickness is of often ten found under these circumstances the result of condensation densa tion tiou and freezing of the water carried from the contained moisture in the atmosphere and from the surface of tho the plants the parched and unhealthy aspect of the plants subjected to such aa treatment is sufficient evidence against the practice |
