(On the relation of this letter to Ephesians and to the letter to be sent from Laodicea to Colossae, see Ephesians, Epistle To The.) His attitude is prophylactic, rather than polemic, for the "philosophy" has not as yet taken deep root.
Red-spiderall these and similar procedures timed to ~catch the pest at a vulnerable stage are intelligent and profitable prophylactic measures, as has been repeatedly shown.
All these prophylactic measures are directed against mosquitoes.
There is some evidence that arsenic has a prophylactic effect.
The planting of eucalyptus trees is out of favour at present, but it appears to have been successful in Portugal, not from any prophylactic virtues in the plant, but through the great absorption of moisture by its deep roots, which tends to dry the subsoil.