SEEDS WEEDS. 53 



The species of Thuya, M. T. M[asters] (Gard. Chron., 3ser., 21 (1897), Nos. 536, 

 pp. 213, 214, figs. 5; 538, pp. 258, 259, figs. 2). — Notes are given on Thuya occidentalis, 

 T. plicata, and T. japonica. T. plicata is considered as a variety of T. occidentalis 

 and not worthy of specific rank. 



The red cedar, R.Douglas ((lard, and Forest, 10 (1897), No. 4S0,pp. 17S, 179).— 

 Notes are given on the growth of this tree and its almost total failure in Illinois is 

 recorded. 



The red cedar (Gard. and Forest, 10 (1S97), No. 479, p. 1GS).— Notes are given of 

 this tree and its value for general planting in parks is pointed out. 



Mixed plantations in British woodlands, A. C. Forbes (Gard. Chron., S.ser., 21 

 (1897), No. 540, p. 295). 



Ornamental and timber trees from seed (Gard. Chron., 3. ser., 21 (1897), No. 53S, 

 pp. 247, 24S). — Notes are given of the propagation of the hornbeam, Spanish chest- 

 nut, hazel, horse-chestnut, walnut, hickory nut, plaue tree, and the cherry. 



Injury to trees, especially firs and pines, by birds, Altum (Ztschr. Forsl- it. 

 Jagdw., 29 (1S97), No. 4, pp. ! :l-'!30, fig. 1). — Notes injury to trees by the very com- 

 mon destruction of leaf buds. 



Forest management in Maine, A. Carey (Forester, 3 (1S97), No. 5, pp. 60-64). 



Reasons for the establishment of forest reservations, B. E. Feknow (Forester, 

 3 (1897), No. 5, pp. 67, 68). 



Cooperative forestry, G. B.JAMES (Forester, 3 (1S97), No. 5, pp. 04-6(1). 



The influence of the removal of dead timber and varying amounts of light 

 upon the growth of conifers, SCHWAPPACH (Ztschr. Forsl- u. Jagdw., 29(1897), No. 4, 

 pp. 201-224). 



Concerning the effect of the removal of dead wood upon forest growth, 

 Hefele (Forstw. Centbl., 19 (1897), No. I. pp. 193-199). 



Effect of lightning upon trees, R. HartiG (Forstl. natarw. Ztschr., 6 (1S97), No. 4, 

 pp. 145-165, figs. 33). 



Insurance against forest fires, Daxckei.maxv (Ztschr. Forst- a. Jagdw., 29 (1897), 

 No. 4, pp. 230-237). 



Timber as a crop, .1. D. Lyman (Agr. Massachusetts, 1896, pp. 22-24, pis. 2). 



SEEDS— WEEDS. 



Electro-germination, A. S. Kinney (Massachusetts Hatch Sta. Bui. 

 43, pp. 32, figs. 12). — After a brief review of the literature relating to 

 the applieatiou of electricity to plant life, an account is given of a 

 series of experiments conducted by the author in which the apparatus 

 and methods employed are fully described. 



The batteries used in the experiments were of two kinds, namely, 

 four Leclanche cells, arranged in series, giving an electro-motive force of 

 four or five volts; and two Samson cells, giving an electro-motive force 

 of 2.88 volts. 



In order to secure a larger variation in the forces obtained, a Du 

 Bois-Reymond induction coil was used. Details of its construction are 

 given. The methods of applying the stimulation are fully described, 

 the moistened seed being placed in glass cylinders and the opening- 

 closed with copper disks to which the wires were attached. 



Another method of applying the stimulation consisted of a glass 

 funnel, in which were two copper disks, the upper one containing 

 twelve holes. Between the two disks was a layer of moist sand in 

 which the seed was planted aud connections were made so the current 



