Final answer:
Margaret's personal support requires a small electric battery, rubber insulation for the wire, a device for summoning spirits, and a mahogany stand, all properly installed.
Step-by-step explanation:
The question pertains to the equipment and aids required for the provision of Margaret's personal support. Based on the provided reference, it seems that Margaret requires a small electric battery, a piece of rubber to insulate the wire, and presumably, a device capable of summoning spirits. This device is to be placed conveniently by the bed, on a neat mahogany stand. The setup includes arrangements that are properly fixed by workmen under direction, enabling Margaret to summon the spirit through an agreed sign. While the details are not fully clear, the mention of widows and women in black suggests that the support Margaret is seeking may be of a spiritual or supernatural nature, often sought by those in mourning.