523 



described by MM. Maisoniieuve, Moreau and Vinet. The steam was 

 supplied from a portable boiler at a pressure of 110-140 lb., equal 

 to a temperature of 340^ to ZQO" F. ; it issued with such violence as 

 to tear off some fragments of bark. After steaming, a number of 

 stocks were decorticated, and out of 50 Clijsia larvae only six were 

 found alive, equal to a mortality of 88 per cent. A more extensive 

 test made a couple of days later resulted in a mortality of 90 per cent. 

 Only about 30 stocks were treated in an hour ; a larger boiler and 

 improved fittings would probably make this treatment economically 

 feasible. 



Vermorel & Dantony. Preparation rapide des Bouillies k la Cas§ine. 



[The rapid preparation of sprays containing casein.]— Pro^res 

 A'jric. Vitic, Montpellier, Ixiii, (32nd year), no. 22, 30th May 

 1915, p. 509. 



The following is an easy method of preparing a stock solution of 

 casein for addition to Bordeaux mixture in order to increase its wetting 

 and adhesive properties : — 3| oz. of casein in powder is well stirred 

 in If pints of water until completely in suspension. Without stopping 

 the mixing, add If pints of milk of lime, the strength of which is 

 not material ; it may vary from 2 oz. to 8 oz. per 1| pints of water. 

 Dissolution takes only a few seconds. In carefully closed containers, 

 this solution will keep indefinitely ; for use, add 2 parts (by volume) 

 to every 100 parts of Bordeaux mixture. 



Dessoliers (H.). Abattoirs t Sauterelles. [Locust abattoirs.] — Bull 

 Agric. Alger. Tun. Maroc, Algiers, xxi, no. 5, May 1915, 

 pp. 109-113. 



Locusts have indifferent sight and, except in an atmosphere well 

 heated by the sun, they fly close to the ground and even then with 

 some difficulty. Their invasions of Algeria are always effected through 

 certain gaps in the Atlas Mountains. On resuming their journey on 

 the day after that on which they have alighted, the swarms follow 

 the general lines of the gap. In a head wind, dense swarms fly along 

 the surface of the spurs they are crossing. It is in such spots that 

 the swarms are thickest and that nets, 7 yards in height and from 

 45 to 110 yards in length, should be hung. Observations made by 

 the author at Mainis since 1892 show that with a head wind the 

 locusts strike the nets in dense masses ; a rear wind drives them on 

 to the meshes, but in reduced numbers ; in calm weather very few 

 individuals attempt to avoid the obstacles, which they seldom seem 

 to perceive. They fall into a trench covered with zinc hoppers, with 

 sides at an angle of 45°. Attracted by a suitable light, they move 

 out into the open by means of a cross tunnel and pile themselves 

 up in chambers covered with netting with a mesh of ^— J- inch and 

 impregnated with heavy oil. To enable air to circulate through the 

 mass of insects the chambers have an open-work wooden floor. 



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