Fumigation investigations in California . gt;l TENTS. Before new tents are marked they should have been m use for a-hort time, so that they will be thoroughly shrunken. This shrinking 56 FUMIGATION INVESTIGATIONS IN CALIFORNIA. may be accomplished, in regions of heavy dews or fogs, by simplyleaving the tents exposed in the open for a few days. Dipping in water or sprinkling bymeans of a hose and thenallowing the tent to dryin the sunshine will an-swer the same purposeif repeated several shrinkage of a new45-foot tent will some-times be as much as 3feet. Tents marked be-fore being shr
Fumigation investigations in California . gt;l TENTS. Before new tents are marked they should have been m use for a-hort time, so that they will be thoroughly shrunken. This shrinking 56 FUMIGATION INVESTIGATIONS IN CALIFORNIA. may be accomplished, in regions of heavy dews or fogs, by simplyleaving the tents exposed in the open for a few days. Dipping in water or sprinkling bymeans of a hose and thenallowing the tent to dryin the sunshine will an-swer the same purposeif repeated several shrinkage of a new45-foot tent will some-times be as much as 3feet. Tents marked be-fore being shrunk willhave erroneous gradu-ations. The most satisfactorymaterial to use in mark-ing tents is dilutedprinters ink. This inkis commonly used in (Jal-ifornia in marking walnutbags. If the ink is toothick to mark freely, itmaybe diluted with kero-sene. Printers ink doesnot cause the cloth to de-teriorate. A mixture oflampblack and turpentine may also be used with entire safety. Thelatter, however, will sometimes rub off to a slight Fig. 19.—Carboywith handles attached to facilitate pourinthe acid and carrying the carboy. (Original.) A DEVICE FOR COVERING FUMIGATION GENERATORS. During the course of this investigation much effort has beendirected toward perfecting a device for attachment to the top of thecommonly used open-style fumigation generator that will serve tointerrupt the direct rise of the hydrocyanic-acid gas. The result ofthese efforts, in which the writer was greatly aided by Mr. FrederickMaskew, is shown in figure 21. The device itself consists of a coppercover of such size as to make it available for use with any of theregular-pattern generators now employed by the lumigators ofsouthern California. It is stamped in a concave form from a sheetof copper, with corrugations to permit the escape of gas. The shapeis such as to conform to the size of the opening of generators of dif-ferent capacities and also to direct the course of the escaping gasdownward and d
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectfumigation, bookyear1
