Rosicrucians, who were a very different body to the present London so-called Rosicrucians. The London society is to all practical intents and purposes a social club, and its business for the most part nonsense. Balls of rock-crystal were once much used for crystal seeing, but they are very rare and diffi cult to obtain. Artificial crystals, egg-shaped polished pieces of glass, are also much used. Seeing in mirrors differs in no way from seeing in crystals, except that the pictures or repre sentations are larger. The spirits of the mirrors say that there are many wandering spirits bound to the earth, who make raps and move tables, but cannot produce the higher phenomena of crystal vision; the rapping spirits on the other hand declare themselves to be a much better sort of people than the crystal spirits; and the writing spirits say that they are infinitely superior to the crystal and rapping spirits. (Laughter.) Swedenborg seems to be communicating to people all over the world at the same time, and the mirror spirits say that those spirits wlo assume his name come from a lowersphere than themselves. The mirror spirits say that they are not in the mirror, but that they can reflect into it whatever the wish to communicate. Sometimes they show themselves, and sometimes they show a book or scroll, containing the message. They have told him that every person in the world has a “double” or atmospheric spirit, and that the bodied and dis embodied spirits of the individual perform all the acts of his life, but not at the same moment. The theory is that there is a place of record of all the acts of each individual life, and that when the earthly spirit is troubled, the atmospheric spirit is troubled like a shadow in water. It is a curious theory. At times, by crystal-vision, persons in distant places may be seen One day, a sceress was looking into one of his mirrors, and she saw in it the Royal College of Surgeons, with a little figure walking in front, who announced himself to her as Dr. Dixon, and said that he wanted to see Mr. Mackenzie at about eight o’clock that evening, to tell him something about Mr. --. This vision was seen between twelve and one o’clock in the day; he (Mr. Mackenzie) wrote down the details at once in a book. The medium had never heard of Dr. Dixon. He then tied up and sealed the book, and asked a friend to write upon the outside of the wrapper, that he had seen it tied up and sealed at that hour. The signature was given, and in the evening he called upon Dr. Dixon, who at first sight of him said that he was so glad to see him, as he wanted particularly On being questioned, to tell him something about Mr. --. Dr. Dixon said that he had been walking in Lincoln’s-inn fields in the morning, and wishing very much to see Mr. After these statements Mackenzie about the said Mr. --. were made, he (the lecturer) gave Dr. Dixon the sealed parcel, and asked him to read the contents, the accuracy of which astounded him. On another occasion, while Captain R. F. Burton, the celebrated traveller, was performing his perilous journey to Mecca and Medina, a seer was looking into one of Mr. Mackenzie’s crystals, and said that she saw Captain Burton very strangely dressed, in a tent, with sand and palin trees outside ; an angry man came in, and Captain Burton laughed at him, offering him his pipe ; this made the man more angry still, and then Captain Burton drew out a pistol When Captain Burton returned to England, the record of this vision was shown him; he said that it was all true, and a faithful description of the only squabble he had while he was in the desert. Captain Burton then wrote an attestation in the book that the account was perfectly true. It is a strange thing, but you can call your own atmospheric spirit into the mirror yourself. “On one occasion,” said the lecturer, “I called myself into the mirror, and asked 'what year it was with him.' He said that 'it was 1865.' I said 'It’s only 1862 with me; what am I doing in 1865?’ (Laughter. Then a large building was seen in the mirror, there was a public platform in it, and I was addressing a public meeting therefrom. Much to my surprise this came true afterwards, for I attended the British Association at Birmingham, in 1865, and spoke upon a public platform about anthropology and kindred subjects.” One somewhat eccentric spirit, who gave the name of Captain Anderson, sometimes appeared in the mirror ; once he showed them a picture which he said was at the Crystal Palace, and which they went and found there ; on several occasions he told them what was taking place in the private families of people who were unknown to the seer. He simply narrated facts, attested by those who had no object in making false representations ; he offered no theory as to spirits being at the bottom of them, or otherwise. His mother was a few years ago a writing medium. She had communications from a spirit who called himself Samuel Jennings, and who said that he was a curate, first at Dover, and afterwards in Wales. On making enquiries at Dover, he found people there who knew that such a clergyman lived in the town at the time mentioned by the spirit. In May, 1865, he was ill, and a spirit who gave the name of Dr. Mizaldus prescribed for him. It was not until yesterday (Wednesday) he knew that a doctor of that name had ever lived, and then, as Dr. Carter Blake could bear witness, he found the name in the British Museum Library. Mizaldus lived at Montluc, France, in 1550, and was the author of at least fourteen books ; his prescriptions on record in the books resembled those the spirit gave at Mr. Macken zie’s house. The physic had a beneficial effect. Neither he nor his mother had heard the name of Dr. Mizaldus, a remark able one, before fit was written through her mediumship. Those who have the power of crystal seeing are often unedu cated, and some of them have the greatest dislike to use the faculty; many people are seers and do not know they possess the power. One medium he knew went into a cold and rigid state while looking in the crystal. Once, and only once, he met Mr. Home, and asked him what he could see in the crys tal? Mr. Home looked for a time, then said he could see nothing; this gave him rather a favourable idea of Mr. Home because if he had wanted to deceive him he would certainly have seen a great deal. Messages have sometimes been trans mitted by visions in crystals. Dr. CARTER BLAKE, F.G.S., Lecturer on Anatomy at West minster Hospital, said that much testimony had been given by the lecturer, but very little evidence. He thought it quite possible that a Samuel Jennings existed before Mr. Mackenzie had the spirit message: in fact, he thought he had heard the name of Jennings before. Then as to Mizaldus, Mr. Mac kenzie was a man of very extensive reading, and he might have once known the name, and afterwards forgotten it. Although he asked for more evidence, and was a sceptic, he did not think that scientific men should place themselves in opposition to phenomena which may be observable. He had read some of the evidence given before the Dialectical Society, and was glad to see that a part of it was given by the chairman, a scientific man of the highest standing, and one who knew what is pure evidence. He thought that scientific men should not place themselves in opposition to any form of human thought.