314 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



seems from the experiments recorded in this pamphlet that there is no 

 danger to trees hy fumigation with potassium cyanide except when done 

 in bright sunlight, when the leaves had begun to expand, or when the 

 charge of chemicals was too great. Black folding tents gave the best 

 results. Such tender trees as the Peach, so long as they are dormant, 

 can be safely treated with 2^ oz. of KCN (98 %) per 100 cubic feet for a 

 period not exceeding BO minutes. The results also show that fumigation 

 may be depended upon to exterminate the San Jose scale on medium- 

 sized orchard trees in small areas ; ^ oz. KCN per 100 cubic feet is 

 sufficient, but more should usually be used. The author recommends the 

 following proportions for use : — 



1 part by weight of potassium cyanide. 



1 ,, volume of sulphuric acid. 



2 „ „ water. 



The paper concludes with descriptions of apparatus used, details of 

 fixing tents, and reccords of experiments showing the time taken for 

 chemical action to take place under varying circumstances between the 

 sulphuric acid and potassium cyanide. The paper is well illustrated with 

 plates and figures showing details of construction of the tents and means 

 of employing them, &c. — F. J. G. 



Fungicides, Effects of, on Foliage. By S. M. Bain (U.S.A. 

 Exp. Stn. Tennessee Report, 190], p. 9). — The botanist at the above 

 station has been investigating experimentally the effects of fungicides on 

 foliage, and a full report on the subject is promised. In the meantime 

 it is said that while Peach foliage showed itself very sensitive to the 

 poisonous effects of Bordeaux mixture used alone a subsequent spray of 

 milk of lime prevented all bad effects, and probably a reversing of the 

 order of applications would be followed by even better results. — M. L. H. 



Fungicides, Insecticides, Spray Calendar (U.S. A. Exp. Shi., 

 Mass., Bull. 80; 3/1902). — This bulletin contains recipes for making 

 spray solutions, recommends them for use against the attacks of various 

 pests, and gives a calendar showing the time to spray for each particular 

 purpose. Very useful for the locality in question. — F. J. C. 



Fungi, Economic and Other. A collection prepared for distri- 

 bution by Flora W. Patterson (U.S.A. Dep. Agr., Bull. 8, 1902).— This 

 is a list consisting of 513 members of parasitic fungi, for the most part 

 with enumeration of their hosts and localities, to facilitate the exchange 

 of specimens between the different bureaus and stations in the United 

 States.— if. C. C. 



Fungi of the Netherlands (Beih. Bot. Cent. bd. xi. ht. 8, pp. 



523-541). — Herr C. A. T. A. Oudemans (Arnheim) gives a list of the 

 Fungi discovered, and, in addition, a Latin diagnosis of seventy-five new 

 species, which are here described for the first time. These consist of 

 Mucronella (1 sp.), Clavaria (2 sp.), Lycoperdon (1 sp.), numerous 

 Ascomycetes, SpharopMea, Melcuiconiccc, Muccdincce, Dematiea, Stilbece, 

 and Tuberoukmea. — G. F. S.-E. 



