Agricultural news . hich are summarizedin the February issue of the Journal of the Boardof Agriculture. The Roche felspar, containing 108 per ^O, yielded 75 per cent, in a soluble form, whilst theLoch Eriboll spar, with 86 per cent. KoO gave 60 percent, soluble. Swedish spar with 129 per cent. .54 per cent, in a soluble form. Expert opiniondescribed the cement as a true hydraulic cement, ofsatisfactory colour, but of much lower tensile strengththan Portland cement. As a result of its examination, the sub-committeeexpresses the opinion that encouragement should begiven to any
Agricultural news . hich are summarizedin the February issue of the Journal of the Boardof Agriculture. The Roche felspar, containing 108 per ^O, yielded 75 per cent, in a soluble form, whilst theLoch Eriboll spar, with 86 per cent. KoO gave 60 percent, soluble. Swedish spar with 129 per cent. .54 per cent, in a soluble form. Expert opiniondescribed the cement as a true hydraulic cement, ofsatisfactory colour, but of much lower tensile strengththan Portland cement. As a result of its examination, the sub-committeeexpresses the opinion that encouragement should begiven to any movement for the manufacture of potashand white cement by the Rhodin process on acommercial scale, and that in the event of a publiccompany applying to the Treasury for permission toraise capital to work this process, the applicationshould receive the strong support of the FertilizersCommittee. It may be mentioned that potash manures aremuch needed at present for potato growing. 138 THE AGRICULTURAL NEWS. May 1917,. INSECT NOTES. INSECT PESTS IN THE WEST INDIES IN 1916. The Annual Report on the prevalence of some pests and•diseases in the West Indies during 191G will be published inthe West Indian BW/f^tra at a later date. Meanwhile it seemsadvisable to give some brief notes on the more important the past year as observed and reported on by the Agri-cultural Officers in the various islands. sui:ae-cane. The grubs of the Antigua brown hard back (Lachnostemaap.) were common in thi northeasiern portion of thatisland and were especially prevalent in the heavy lands towardsthe central districts The Mycologist and the Entomologistof this Department visited Antigua in March 191(j, and duringtheir visit the scoliid parasite, probably Tiphia pdvalltin. wasfound to be established in a portion of the infested recommendations suggested for the control of the Lach-nostema grubs included rotation of crops, better drainageof all heavy lands, the application of pen m
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