They sometimes excite extraordinarily rapid inflection, but this is not an invariable result.

Propionic, strong but not very rapid inflection; poisonous.

Acetic, strong and rapid inflection; poisonous.

Hydrocyanic, rather rapid inflection; very poisonous.

Gold chloride, rapid inflection: quick poison.

Nickel chloride, rapid inflection: probably poisonous.

Benzoic, rapid inflection; very poisonous.

Platinum chloride, rapid inflection: poisonous.

Sodium sulphate, moderately rapid inflection.

Sodium phosphate, very rapid inflection.

Sodium chloride, moderately rapid inflection.

Sodium oxalate; rapid inflection.

Sodium carbonate, rapid inflection.

Sodium nitrate, rapid inflection.

Sodium citrate, rapid inflection.

Some cause much more energetic and rapid inflection of the tentacles, and keep them inflected for a much longer time, than do others.