193 



Degrully (L.). Efficacit6 compar6e des Bouillies bordelaises acides 

 et alcalines. [The relative Efficacy of acid and alkaline Bordeaux 

 Mixtures.] — Progres Agric. Vitic, Montpellier, Lxvii, no. 7, 18th 

 February 1917, pp. 149-154. 



In the course of a series of experiments with Bordeaux mixture 

 used as a fungicide it was found that by using a good alkaline 

 mixture, the amomit of copper could be reduced by at least one-third, 

 without in any way diminishing the efficacy of the spray. Even 

 if the acid mixtures be considered more efficient at the moment of 

 their application, their action is necessarily ephemeral, as they are 

 quickly and easily washed off by rain, while the alkaline solutions 

 are far more adherent. The usual objection raised against the use of 

 alkaline mixtures, in that the free lime affects the solubility of the 

 reserve copper, is discussed, but this is not considered a serious ob- 

 j ection in practice. 



Vermorel (V.) & Dantony (E.). Les bouillies acides et les bouillies 

 alcalines. [Acid and alkaline Mixtures.] — Progres Agric. Vitic, 

 Montpellier, Lxvii, no. 9, 4th March 1917, pp. 201-207. 



Tliis paper gives a detailed account of the experiments with acid 

 and alkaline Bordeaux mixtures referred to above. 



Heron (G.). Bouillies acides et bouillies alcalines. [Acid and alkaline 

 Mixtures.] — Progres Agric. Vitic, Montpellier. lxvii, no. 10, 

 11th March 1917, pp. 228-230. 



The author differs from the conclusions arrived at in the preceding 

 papers and considers that acid mixtures are more eliective as fungi- 

 cides. 



Ran A (L). Cura de los Arboles con acido cianhidrico. [Treatment of 

 Trees with Hydrocyanic Acid.] — Gaceta Rural, Buenos Aires, x, 

 no. 115, February 1917, p. 405. 



The following formula, which has been used with good results in 

 Buenos Aires, is recommended for fumigating orange-trees : for every 

 AO cubic feet of the fumigating tent which covers the tree allow f oz. of 

 ferrocyanide of sodium, and 1 oz. of sulphuric acid diluted in water 

 to 25 per cent. This mixture should be boiled over an alcohol heater 

 in the tent for 30 or 40 minutes for a medium-size tree. If alcohol 

 has been used in the heater in the proportion of \ pint to 520 cubic 

 feet of space in the tent, the fire will then be burnt out and the tent 

 can be removed, the operator remaining on the windward side so as 

 to avoid the fumes. Such fumigation should destroy all insects 

 that it reaches and can be employed at any time except when there 

 are young shoots or leaves on the trees. 



Mayheux (G.). The Inspection of Nurseries.— /l^n'c. Gaz. Canada, 

 Ottawa, iv, no. 2, February 1917, pp. 132-134. 



The object of the legislation concerning the inspection of nurseries 

 which was sanctioned on 19th February 1914 is explained in this 

 article, as well as its organisation and administration. The black list 



