11 
Carbon Bisulphid. — A carbon bisulphid treatment was also harm- 
less so far as tested by stirring the undiluted fluid into the corn at 
the rate of 2 and 4 ounces per gallon, or by soaking the seed in the 
fluid for 10 minutes. 
Copper Sulphate.— 'Seed-covn soaked in a saturated solution of blue 
vitriol was uninjured after 5 and 10 minutes' treatment, and 90 per- 
cent of the seed germinated after 20 minutes' soaking, but only 83 
percent after 30 minutes (16 percent of the plants being injured) and 
80 percent after an hour, all of these last plants showing injury. 
Iron Sulphate. — Two hundred kernels of seed-corn soaked in a 
saturated solution of copperas for periods varying from 5 minutes 
to 16 hours, and in lots of 50 kernels each, were uninjured as to 
germination, averaging 95 percent. 
Tobacco-water. — Strong solutions of tobacco-water, obtained by 
boiling the stems, did no injury to seed or plant, even when the corn 
was soaked from 1 to 24 hours. Three hundred and fifty kernels thus 
treated, 100 of them for the longer period, gave an average germina- 
tion ratio of 98 percent. 
Musk. — Commercial Tonquin musk, mixed with wood alcohol at 
the rate of 1 part of musk to 10 of the solvent, did no injury to the 
seed when 3 ounces of the mixture were thoroly stirred into a gallon 
of corn. Neither a 5 percent nor a 10 percent solution of the musk 
in ordinary alcohol injured the seed after 5 minutes' soaking, but a 
longer exposure diminished the ratio of germination, and soaking for 
an hour was decidedly injurious. These effects were, however, quite 
possibly due to the alcohol. 
Mustard. — Mustard was injurious when applied in the powdered 
form, but 16 hours' soaking in a saturated solution with water did 
not affect germination. 
Miscellaneous substances. — The proprietary insecticides "Scale- 
cide," "Con Sol," "Calcothion," and "Frutolin" were all without effect 
upon the seed, tested by soaking the seed in them for 5 to 30 minutes. 
"Scalecide" was used in 5 and 10 percent mixtures with water, "Con 
Sol" in a 2^ percent mixture, and "Calcothion" and "Frutolin" pure. 
Twenty lots, amounting to 1000 kernels, were soaked in these various 
insecticides, none giving less than a germination ratio of 92 percent, 
and most of them rising to 98 and 100 percent. 
Fifty kernels of corn left in coal-tar for a minute and planted at 
once, all grew but one — very slowly, however, and with more or less 
appearance of injury, the plants averaging only Sys inches in height 
four weeks after planting. Soaked in coal-tar for 16 hours, only 11 
kernels grew out of 50, and the plants from these were all stunted and 
otherwise injured. 
Tar-water, obtained by pouring water upon coal-tar and stirring 
the two together and leaving for a time to settle, did no injury to 50 
grains of seed soaked for half an hour or an hour. 
Camphor was imperfectly tested by soaking seed-corn for 10 min- 
utes and for an hour in a saturated solution of the gum in alcohol. 
