Phenomena
Phenomena is the plural of the Greek word phenomenon (φαινόμενoν), and refers to any occurrence that is observable. The term came into its modern philosophical usage through Immanuel Kant, who contrasted it with noumenon, the "thing-in-itself" that is not directly accessible to observation.
In Theosophical literature the word is often applied with the meaning of "appearances" or "illusion", in a similar sense to the Hindu concept of maya.
A second usage is related to psychic and occult manifestations which, though regarded as "miracles" by the masses, are in reality "manifestations of natural law"(ML App. I)
Physical phenomena
Many of the physical phenomena were related to spiritualistic occurrences such as raps, materializations, etc.
As a rule, physical phenomena are produced by the nature-spirits, of their own motion and to please their own fancy, still good disembodied human spirits, under exceptional circumstances, such as the aspiration of a pure heart or the occurrence of some favoring emergency, can manifest their presence by any of the phenomena except personal materialization.[1]
Psychic phenomena
But, while it is our firm belief that most of the physical manifestations, i.e., those which neither need nor show intelligence nor great discrimination, are produced mechanically by the scin-lecca (double) of the medium, as a person in sound sleep will when apparently awake do things of which he will retain no remembrance. The purely subjective phenomena are but in a very small proportion of cases due to the action of the personal astral body. They are mostly, and according to the moral, intellectual, and physical purity of the medium, the work of either the elementary, or sometimes very pure human spirits. Elementals have naught to do with subjective manifestations. In rare cases it is the divine spirit of the medium himself that guides and produces them.[2]
No true theosophist—the accused party least of all—believes in miracles, though every true theosophist ought to believe in the existence of` abnormal powers in man; "abnormal" because, so far, either misunderstood or denied. All such objective physical phenomena, however, are simply psychological “glamour,” i.e., if not witchery, at least “a charm on the eyes and senses.” This, people may call brutally “trick,” but since they are psychic, they cannot be physical: hence, no conjuring or “sleight of hand.” As well call “tricksters” the grave medical celebrities, who hypnotize their subjects to see things which have no reality! “Theosophical phenomena” differ from these in this: that while hypnotic hallucinations are suggested by the operator’s idle fancy, occult manifestations are produced by the will of the Occultist, that one or a hundred men should see realities, generally hidden from the profane, e.g., certain things and persons thousands of miles away, whose astral images are brought within the view of the audience. Thus a cup may never have been broken in reality, and yet people are made to see it shattered in atoms and then made whole. Is this a juggler’s trick? Occult phenomena are then simply a hundred-fold intensified hypnotism, and between the hypnotic hallucinations at the Salpêtrière and the magic of the East there is chiefly a question of degree.