Dealing first with the latter, it suffices, by way of example, to mention the researches conducted by Mr. W. J. Crawford, D.Sc., a gentleman who is Lecturer in Mechanical Engineering in the Belfast Municipal Technical Institute, Extra-Mural Lecturer in Mechanical Engineering in the Queen’s University of Belfast, etc. It is a matter of common knowledge in scientific circles, and to a large extent in popular circles as well, that he has, with respect to the “survival” question, carried out a series of experiments and tests under the most rigid conditions for ensuring accuracy of observation and correctness of results--experiments and tests that have been witnessed by competent persons and carefully recorded in a manner to which no valid exception can be taken. In the ordinary way of scientific work the conclusions arrived at by such a trained and eminently well-qualified observer would be assented to by the scientific world as a matter of course; and such assent should not be withheld merely because the field of investigation lay outside the beaten tracks of Science. Dr. Crawford’s observations and experiments are of quite recent date. They have impressed greatly the scientific world. They are regarded as proving the existence of the “invisible intelligent beings” mentioned by Sir William Crookes in 1874, and as also proving that these beings are encountered and communicated with here in this world. But the knowledge of the work done by Dr. Crawford is not yet very widely spread, and it is quite possible that many scientific men as well as a good portion of the public at large are still unacquainted with its character and the results attained. It may be well, therefore, to cite an illustrative instance of one of the methods employed. This is done in the scientist’s own words:-- “A drawing-board was placed on the platform of a weighing-machine and a chair was placed on the top of the board. The medium (Miss Goligher) sat on the chair, with her feet resting on the board. “_Experiment 1._--I said to the operators [_i.e._ to the spirits], ‘You say the levitating cantilever contains matter from the body of the medium. I want you to take out from her body the matter you use in the construction of the cantilever you employ to levitate this table (weight 12¼ lbs.) and to place this matter loosely on the floor--not to build up the cantilever but simply to place the matter required for it on the floor. Give three raps when you have done this.’ “The medium’s weight began to decrease and in a few seconds became fairly steady. Then I heard the three raps, signifying that the operation was complete. RESULT: Weight of medium + chair + board, before the experiment 9 st. 12½ lbs. Fairly steady weight of medium + chair + board, after the raps were given 8 st. 10½ lbs. Decrease in weight of medium 0 st. 16 lbs.