Fumigation investigations in California . Fig. 17.—Siphoning acid from drums by means of a rubber hose. (Original.) From carboys. Two common methods used for removing acidfrom carboys in the held are shown in figures 18 and 1!). In the firstmethod a small amount of dirt is placed againsl one side of the car- Ill i: MARKING 01 I IN IS. boy, Furnishing a son of rest when the latter is tipped to remove theacid. It is well to scoop out a small pit below this ridge of dirt, intowhich the vessel receiving the acid may be lowered when the acid isbo largely removed that it is necessary to turn the car
Fumigation investigations in California . Fig. 17.—Siphoning acid from drums by means of a rubber hose. (Original.) From carboys. Two common methods used for removing acidfrom carboys in the held are shown in figures 18 and 1!). In the firstmethod a small amount of dirt is placed againsl one side of the car- Ill i: MARKING 01 I IN IS. boy, Furnishing a son of rest when the latter is tipped to remove theacid. It is well to scoop out a small pit below this ridge of dirt, intowhich the vessel receiving the acid may be lowered when the acid isbo largely removed that it is necessary to turn the carboy far on itsside in order that all may be withdrawn. In figure 19 the handles on the carboy are substitutes for the heapof dirt and the pit. They are also of service in carrying the Tin: PROTECTION OF (YAM I). Many fumigators donot attempt to covertheir cases of cyanid,hut leave them open during the day. Tinsnot only constitutes asource of danger to various animals, butalso during the wetseason allows water toreach the cyanid. Fig-ure 20 shows a simplelid covered with zincwhich is suitable forplacing on a cyanidcase to protect its con-tents. HYDROCYANIC-ACID GAS IX DRUMS. Some discussion hasarisen during the past Year relative to the Fig. 18.—Carboy resting against a heap of dirt to facilitate pouring possibility of introduc- • kL (0rigInal- ing hydrocyanic-acid gas into drums under pressure, and using itdirectly from tin1 drums, thus doing away with all generation in thefield. The use of this gas under pressure from drums is impossibleat the present time for two reasons: (1) No drums are made whichwill hold hydrocyanic-acid gas without corroding; (2) we know of noinstrument which will measure gas accurately under varying degreesof pressure, such as would exi
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectfumigation, bookyear1
