INDEX. 109 
Page. 
Fumigation of citrus trees, cautions, general 80 
chart for dosage (see also Fumigation of citrus trees, 
dosage schedule). 
how to use it 34-37 
chemicals 40-51 
amount in very small dosages 48 
mixing 48-49 
proportions, most economical 47-48 
proportion when sodium cyanid is used . . 85 
comparison of sodium cyanid and potassium cyanid 
for general fumigation 90 
cost 78-79 
cover for generators 74-76 
cyanid of potassium 40-41 
sodium, kind to purchase 88 
proportion used 85 
derricks and poles 20-21 
distribution of gas within a tent 67 
dosage calculation 27-28 
factors affecting it 52-53 
schedule A, for high grade sodium cyanid... 88 
No. 1, for potassium cyanid 34 
|, for potassium cyanid 59 
f-A, for high grade sodium 
cyanid 88 
under improved system (with potas- 
sium cyanid) 34-37 
dosages for scale pests in general (with potassium 
cyanid) 61 
various scale pests, with potassium cyanid 51-61 
sodium cyanid . . 88-90 
during blossoming period 64-65 
effect of presence of sodium chlorid on amount of gas 
given off 49-50 
on ladybirds (Coccinellidae) and Scutellista 
cyanea 77-78 
effects of cold 70-71 
heat 69-70 
light 71-72 
meteorological elements 68-72 
moisture 68-69 
temperature 69-71 
winds 72 
on different varieties 67 
unhealthy trees 66-67 
extent to which it is now practiced in California . . . 3-4 
factors which affect dosage 52-53 
field tests with sodium cyanid 86-87 
for physiological effects 67-68 
fumigating lemons 65-66 
generating vessels 24 
cover device 74-76 
historical 1-2 
improved system 32-40 
