rORESTKY. 445 



of tlio (levoloi)iiioiit of ctlicfiziitioii in tlic forcint,' (if lilacs in Ccnn.niy is jiivcii, 

 with the results of i-ccciil cxpcriiin'iils by the nullior. 



With the varicly .Marie Lci^rayc it was observed that by the end of July the 

 llower buds had already formed. When the plants were defoliated at this time 

 and broujrht in a elose, moist, warm air, they blossomed within 4 weeks without 

 etherization. The plants did not blossom any sooner than this when etheri/.ed 

 either before or after defoliation, neither did the plants jiroduce bloom when 

 brought into a warm, moist atmosi)here indess they were first defoliated. When 

 the plants were defoliated and left in the open, even in warm weather, they did 

 not produce flowers. A moist temperature, as well as a warm one, seemed to be 

 an essential condition of their bloominj;. It is believed that these observations 

 make an important supplement to the theory of Johannsen on the decree of 

 maturity and rest period of plants. 



With the variety Charles X the llower buds did not develop so early nor 

 did they respond when tliQ i)lant was defoliated in a warm, moist atmosphere, 

 as was the case with Marie Legraye. When this variety was defoliated and 

 etherized Jidy 27, a large number of the uppermost buds wei'e killed, though 

 many leaves were sent out from the lower buds. When etherized with 40 gm. 

 of ether per hectoliter of space, with the leaves on, it j)roduced several well 

 expanded flower clusters 4 weeks later. With Charles X, as with the Marie 

 Legraye, plants neither defoliated nor etherized did not produce flowers even 

 though kept in a warm, moist atmosphere. 



The results show that with Marie Legraye it is possible to have flowers from 

 the beginning of August on, and with Charles X from about the first of Sep- 

 tember. At this time about 40 gm. of ether per 100 liters space can be safely 

 used with the latter variety. 



Epsom salts for azaleas, J. C. IIogenson {Gard. Mag. [N. Y.]. Jf (1906), 

 No. 5, p. 228, fifjx. S). — The author successfully grew azaleas in soils well sup- 

 plied with lime by the use of sulphate of magnesia to counteract the lime. 



In the experiment here reported 2 plants as nearly alike as possible were 

 I)otted separ.'itely in a compost to which nearly a half ounce of lime was added 

 to every r> lbs. of soil. To one of the pots there was added in addition a (pi.arter 

 of an ounce of sulphate of magnesia to every pound of soil. The flower buds of 

 the plant in the pot to which no sulphate of magnesia, was added made a poor 

 development, and finally turned brown and dried up without opening at all. 

 while in the pot in which the sulphate of magnesia was added the plant made 

 a good, vigorous growth and bore and abundance of flowers. Like results were 

 also secured with rhododendrons. 



FORESTRY. 



Forest planting on coal lands in western Pennsylvania, S. X. Spring 

 (('. S. Drpt. A(/r., Forest ,Serv. (Jin: J/l, pp. 16). — A brief history is given of 

 the original forest c(mditions of the coal lands in Pennsylvania, with an account 

 of the development of coal mining and its effects on .agriculture and forestry 

 in the mining district. The injurious effects on all vegetation of coke produc- 

 tion, due to sulphur gas, is briefly mentioned and the opportunity for forest 

 Iilanting on these lands discussed at considerable length. 



A planting plan covering 450 acres was made for lands in this area and is 

 given in detail. The plan, it is believed, will be generally applicable to the 

 Connellsville basin in Pennsylvania. The chief trees recommended are red oak, 

 chestnut, white oak, European lanli. yellow poi)lar. hard maple, and hardy 

 catalpa. The plan provides for the growing of nur.sery trees for restocking 



