For similar reasons the room in which the sitting is conducted should be only moderately warm and shady as possible, provided it be not actually dark. A light by which one can just see to read average print is sufficient for the purpose in view. The crystal with which we have had the most satisfactory and surprising results is a cube of fine azure beryl, the deep blue of its serene depths being peculiarly restful and inspiring. But, as we have said, nothing is more effective than the white quartz crystal when found suitable. It is important that all persons sitting in the same room as the seer should be at arm's length away from him--farther if possible. Silence should be uniformly observed by those present. A recorder should be at hand to set down everything the seer may give voice to. If any questions are addressed to the seer while the sitting is in progress, they should be spoken in an undertone and as nearly a monotone as may be so that the seer is not suddenly surprised into consciousness of his surroundings, and the psychic thread thereby broken. At first the sittings should not be of longer duration than fifteen minutes, but it is important they should take place _regularly_, every day if possible, and always at the same hour and in the _same place_. By this method of procedure it will be found that a cumulative effect is produced and success more speedily ensured. The reason is obvious. All actions tend to repeat themselves, to become automatic, to pass from the purposive into the habitual, and hence the psychic faculties will, if actuated at any set time and place, tend to bestir themselves towards the same end as that to which they were first moved by the conscious will and intention of the seer. Until definite and satisfactory results are obtained, not more than two persons should be present at the sittings, and these should be in sympathy with the seer and each other. When the sitting is over, it will be found agreeable and useful to discuss the results obtained; or if none are elicited, the seer can give an account of his or her impressions and feelings during the sitting. It will be interesting to note these experiences and to compare them from time to time.