NOTES AND ABSTRACTS. 



718 



Spruce, A Giant (Journ. Eort. August 6, 1903, p. 128).— One felled 

 to exhibit at the " World's Fair " in Oregon was 800 ft. high and 40 ft. 

 round. Its age was estimated at 440 years. It is said to have been an 

 " Aberdeen " Spruce, but if the age given is correct it must have been a 

 native Spruce. — G. W. D. 



Stigmonose, a Disease of Carnations and other Pinks. By 



A. F. Woods (U.S.A. Dep. Agr. Div. of Pathology, Bull. 19, 1900; 

 3 plates, 5 figs.). — The author states that the disease of Carnations 

 commonly attributed to bacteria, and known as " bacteriosis," is a con- 

 dition induced by the punctures of insects, principally aphides and thrips, 

 and of mites ; and further that the changes involved are dependent to a 

 large degree on the condition of the . plant and the time the punctures 

 are made. The disease is characterised by the appearance of small, 

 pellucid dots, irregularly scattered through the leaf, seen when the fully - 

 grown but young leaves are held against a strong light, and sometimes 

 having a yellowish centre. Later the dots become pronounced, and 

 whitish or reddish sunken spots appear in the leaf. The author supports 

 his statements by many apparently conclusive experiments, and examines 

 the results obtained by previous workers. He recommends the proper 

 selection of cuttings, careful propagation of stock, good soil, proper 

 amount of moisture, light, and air ; reduction of number of aphides &c. 

 to a minimum by timely fumigation and syringing. — F. J. C. 



Stock and Scion, Influence of the Former on £he Latter. 



Anon. (Gard. Chron. No. 855, p. 312; May 16, 1903).— Some very 

 interesting experiments have been made by M. Leclerc du Sablon on this 

 subject, which he has communicated to the Academy of Sciences. It 

 appears from his investigations that the reserve matter accumulated in 

 the stem during the resting period is greater when the Pear is grafted on 

 the Quince than if grafted on another Pear, on account of the roots of the 

 Quince containing less reserve material than those of the Pear, so that the 

 stems remain richer in nutritive matter in consequence, and the latter, 

 being nearer to the fruit, is more easily assimilated by it. Experiments are 

 being made with other plants with a view of confirming the results already 

 arrived at in the case of the Pear. — G. S. S. 



Strawberries and Salicylic Acid. By L. Portes and A. Desmoulieres 

 (Ann. Agr. p. 112 ; Feb. 1902). — By the violet coloration on the 

 addition of perchloride of iron, salicylic acid has been found chiefly in 

 Wood Strawberries, four season, ' Paxton,' ' Hericart,' ' Jugonda,' and 

 ' Brest.'— C. H. H. 



Strawberries, Fertilisers for (U.S.A. Exp. Stn. Bhode J., Bep. 

 1902, pp. 247-252).— The results of experiments extending over two years 

 tend to show that sulphate of ammonia, and sulphate of potash are the 

 best forms of nitrogen and potash respectively to apply for Strawberries. 



F. J. C. 



Strawberries : Retardation under Blue Glass (Bev. Hort 

 October 1, 1903, pp. 444-5). — M. Camille Flammarion reports results of 



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