. Florists' review [microform]. Floriculture. OST members of the trade are well aware that potas- sium cyanide, as a genera- tor of hydrocyanic acid gas, has been superseded by so- dium cyanide, a slightly stronger chemical. The Ee- view has repeatedly supplied compre- hensive instructions in regard to fumi- gation with potassium cyanide and has also given briefer suggestions about the use of sodium cyanide. The directions ?\7hich here follow, and which have refer- ence chiefly to sodium cyanide, consist of extracts from a bulletin prepared by members of the TJ. S. Department of Agriculture. T
. Florists' review [microform]. Floriculture. OST members of the trade are well aware that potas- sium cyanide, as a genera- tor of hydrocyanic acid gas, has been superseded by so- dium cyanide, a slightly stronger chemical. The Ee- view has repeatedly supplied compre- hensive instructions in regard to fumi- gation with potassium cyanide and has also given briefer suggestions about the use of sodium cyanide. The directions ?\7hich here follow, and which have refer- ence chiefly to sodium cyanide, consist of extracts from a bulletin prepared by members of the TJ. S. Department of Agriculture. The authors of the bulletin, E. E. Sass- cer and A. D. Borden, state that "the yield of cyanogen from one ounce of high-grade sodium cyanide is equivalent to the yield from one and one-third ounces of high-grade potassium cya- ; "With that ratio as a basis of computation, growers who have used potassium cyanide should be able to estimate the needed quantities of so- dium cyanide. Computing the Cubic Contents. It is essential in every instance, says the bulletin, that the cubic contents of the house to be fumigated be deter- mined accurately, and the following is a simple method of arriving at these figures: To secure the cubic contents of the even-span house in the accompanying diagram, compute the number of square feet in the rectangle A and in the right- angle triangles B and C and multiply the sum of the three by the length of the house. To calculate the area of a right-angle triangle, multiply the base by the perpendicular and divide the product by 2, For example, A=5X20 =100 square feet; B=5X10->2=25 square feet; and C=5XlO-s-2=25 square feet. A+B+C=150 square feet; 150 square feet X 100 feet (length of house) =15,000 cubic feet, cubic con- tents of the house. To secure the cubic contents of the three-quarter-span house in the dia- gram, multiply the sum of the rectangles A and D and right-angle triangles B and C by the length. For example, . /^ *^ '
Size: 2309px × 1083px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecad, booksubjectfloriculture, bookyear1912
