In another part of the room an apparatus was fitted up for experimenting on the alteration in the weight of a body. It consisted of a mahogany board, 36 inches long by 9-1/2 inches wide and 1 inch thick. At each end a strip of mahogany 1-1/2 inches wide was screwed on, forming feet. One end of the board rested on a firm table, whilst the other end was supported by a spring balance hanging from a substantial tripod stand. The balance was fitted with a self-registering index, in such a manner that it would record the maximum weight indicated by the pointer. The apparatus was adjusted so that the mahogany board was horizontal, its foot resting flat on the support. In this position its weight was 3 lbs., as marked by the pointer of the balance. [Illustration: PLATE XII. CAGE OF COPPER WIRE, ELECTRICALLY CHARGED, USED BY PROFESSOR CROOKES IN THE HOME ACCORDION EXPERIMENT.] Before Mr. Home entered the room the apparatus had been arranged in position, and he had not even the object of some parts of it explained before sitting down. It may, perhaps, be worth while to add, for the purpose of anticipating some critical remarks which are likely to be made, that in the afternoon I called for Mr. Home at his apartments, and when there he suggested that, as he had to change his dress, perhaps I should not object to continue our conversation in his bedroom. I am, therefore, enabled to state positively, that no machinery, apparatus, or contrivance of any sort was secreted about his person. The investigators present on the test occasion were an eminent physicist, high in the ranks of the Royal Society,[64] a well-known Serjeant-at-Law;[65] my brother; and my chemical assistant. Mr. Home sat in a low easy-chair at the side of the table. In front of him under the table was the aforesaid cage, one of his legs being on each side of it. I sat close to him on his left, and another observer sat close to him on his right, the rest of the party being seated at convenient distances round the table. For the greater part of the evening, particularly when anything of importance was proceeding, the observers on each side of Mr. Home kept their feet respectively on his feet, so as to be able to detect his slightest movement. The temperature of the room varied from 68 degrees to 70 degrees F. Mr. Home took the accordion between the thumb and middle finger of one hand at the opposite end to the keys (see Pl. XII A) (to save repetition this will be subsequently called "in the usual manner").