. Agricultural news. Agriculture -- West Indies; Plant diseases -- West Indies. The Monthli/ Bidletiii. of Ayriadtwral Inteliigence aiui Plant Disease!? (September 1913) describes the mechanism as follows:— 'It consists, as may be seen from the annexed figures, of a cylindrical body closed on two sides by plates, one of which bears the suction pipe and the other the forcing pipe. Within the body revolves another cylinder, in each of the faces of which a deep groove is cut at right angles to the one at the other end, and a block of metal like a water tight piston slides in each of the grooves.
. Agricultural news. Agriculture -- West Indies; Plant diseases -- West Indies. The Monthli/ Bidletiii. of Ayriadtwral Inteliigence aiui Plant Disease!? (September 1913) describes the mechanism as follows:— 'It consists, as may be seen from the annexed figures, of a cylindrical body closed on two sides by plates, one of which bears the suction pipe and the other the forcing pipe. Within the body revolves another cylinder, in each of the faces of which a deep groove is cut at right angles to the one at the other end, and a block of metal like a water tight piston slides in each of the grooves. These blocks are traversed and driven by two diametrically opposed excentrica fixed on the driving shaft, which occupies a slightly excentric position towards the axis of the cylindrical body of the pump. 'Fig. 1 is a section of the apparatus showing the arrange- ment of the working parts. Fig. 2 is a perspective view of the movable parts.' Electricity ajid Crop Production.—Aa interesting article appears in the Journal of the Board of Agriculture (October 1913) on electricity and crop produc- tion, liecent experiments have shown that the immediate problem is the provision of a genuine control area, for a control area unaffected by the discharge cannot be obtained within hundreds of yards on the leeward side of the electrified area. It has been decided to use screens of galvanized iron wire but even then the discharge will probably have to be stopped whenever a strong wind is I'lowing from the electrified area towards the control. It is added that these experiments must be continually accompanied by purely physiological work in the laboratory for the purpose of determining accurately the effect of electrical discharge upon each plant function, such as transpiration, photosynthesis and the like. Much satisfaction has accompanied the employment of lead labels in the Botanic Gardens, Grenada. These are ma<le with letter punches. In a recent communication, the Superintendent
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Keywords: ., bookauthorgreatbritainimperiald, bookcentury1900, bookdecade1900
