Agricultur, Horticultur, Forstbotanik. 207 



(Rev. gen. Bot. XIV. 139. p. 269. 1902) and Jumelle (1. c. XVII. p. 49, 

 1905) that potato tubers are caused b}^ an endotropic Fusarium.. 

 Vöchting has shown that aerial tubers can be produced by exclu- 

 ding light and reducing transpiration while Knight long ago found 

 that removing the tubers as fast as they form causes the food mate- 

 rials to acumulate in the stems above ground and induces tuber 

 formation there. To explain the specimen under discussion it is 

 suggested that a current of digested food into the developing shoot 

 whose elongation was hindered by an insufficient water supply was 

 perhaps able to produce the aerial tuber even in daylight. 



W. T. Swinorle. 



*&* 



Halstead, B. D., Forest Trees^ of New Jersey, (Bull. 202, 

 New Jersey Agric. Exp. Station (New Brunswick, N.J.), p. 1-52. 

 figs. 1—25. Apr. 25. 1907.) 



This bulletin is a compilation from a number of arficles dealing 

 with the forest trees of New Jersey. On p. 6 — 46 is given a ''List 

 of New Jersey Trees" based on N. L. Britton's Flora of New 

 Jersey, 1889, with copious quotations from Gifford, Pinchot, Hol- 

 lick, Meier and others, The list comprizes 104 species of which 98 

 are native and 6 adventitious. The species treated in most detail are 

 the following: Pinus strobiis, thrives on poor soils. P. rigida, grows 

 on dry poor soils where other trees die. P. echinata, preferred for 

 planting in southern N. J. Chamaecyparis thyoides, valuable timber 

 tree for swamps. Popidus deltoidea, wood used for paper pulp, 

 Castanea dentata, recommended where fires can be kept out. Qtier- 

 ciis rubra j coppice in pine barrens. Q. platanoides , rare but recom- 

 mended for planting in low regions. Rohinia pseiidacacia (escaped 

 from culture), much planted. 



On p. 47 — 48 are listed 35 papers on New Jersey trees, publi- 

 shed in State reports and on p. 49 — 52 the various laws of the State 

 relating to forestry are summarized. W. T. Swingle. 



Hayward, H. and H. S. Jaekson. A Study of Delaware Seed 

 Corn. (Bull. 77, Delaware Agric. Expt. Station (Newark, ?Del.), 

 p. 1—16. 2 folding tables. figs. 1-10 (halftones), Apr. 1907.) 



A well illustrated bulletin urging the farmers of Delaware to 

 plant better seed corn. An investigation was made of the corn grown 

 of 150 Delaware farms and only 31 farmers knew to name of the 

 variety grown. Altogether some 18 different named varieties were 

 found in culture. The results of the investigation were shown in the 

 tables. Table I. gives for the 150 samples studied 1) the per cent. 

 of corn to cob, 2) the per cent. of protein, 3) the germination in 

 germinator, 4) the germination in sand. The percentage of kerneis 

 to cob varies from 1T\q to 89.1% in Blount's Prolific, it runs in 

 most cases from SO^'/q to 88'^/,j. The amount of protein in the kerneis 

 varies from 7.560/o to 12.507o in N^. 71, an unknown variety. The 

 percentage of protein generally runs from 9 to 11. The germinative 

 power ranged from 700/o to IOO^/q, usually from 90'^/o to 997o- 



Table II. gives for the same 150 samples, the name, type of 

 soil, how planted, fertilizer used, time of selecting seed, method of 

 storing seed, yields for 1904, 1905 and 1906, and notes on :the 

 samples by Mr. C. P. Hartley. The yield varied from 10 to 100 



