110 HYDROCYANIC -ACID GAS FUMIGATION IX CALIFORNIA. 



Page. 



Fumigation of citrus trees, improved system, advantages 37-3? 



experience with, it 38-40 



injury- to sprayed trees 72-73 



leakage of gas, allowance therefor under improved 



system 3:3-34 



McFadden machine for hoisting tents over trees 21-22 



supply wagon 23-24 



nature of residue resulting from generation of gas. . 50—51 



poles and derricks 20-21 



presence of old scales on fumigated trees 74 



procedure, general 24-31 



improved system 37 



old method 30-31 



published articles and addresses by R. S. Woghim.. . SI 



renewal of interest in California 2-3 



securing measurements around and over tents 28-30 



securing measurements around and over tents. Mor- 

 rill method 29-30 



sulphuric acid 41—13 



amount necessary 42-43 



proportion used with sodium cyanid . . 85 



supply cart and supply wagon 22-24 



systems employed in California 4-6 



tents 10-20 



bell 16 



. : 5-proofing 16-18 



marking 19-20 



mildew-proofing 18-19 



sheet 10-16 



amount of cloth required for different- 

 sized tents 14-15 



construction 1:3-14 



experiments with new tent material. ... 12 



material used 11 



new tenting material 11-12 



ring attachments and reenforcements. . . 15-16 



sizes 11 



size to purchase 15 



what cloth to use 12-13 



time of year 61-63 



water as a factor 44-47 



correct proportion with potassium cyanid 47 



sodium cyanid 85 



effect of different proportions on amount of 



available gas ". 45—47 



effect of different proportions on temperature 



of gas 45 



while fruit is small 65 



Fungus, black, following infestation of cirrus fruits by mealy-bug 10 



sooty-mold, following infestation of oranges by black scale 3. 9 



Gas. [See Hydrocyanic-acid gas 



Generating vessels, for fumigation 24 



cost 79 



cover device 74-76 



